The Environment



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Item FY 2019 results FY 2020 results
Implementation rate of biodiversity conservation activities for ecosystems near production facilities (Consolidated) 67%
(13 domestic business locations, and 9 overseas locations)
(Consolidated) 69%
(13 domestic business locations, and 9 overseas locations)
Biodiversity in each area, and impact Yokohama Tire Retread Co., Ltd. (YTRH)
Vicinity of Lake Utonai
Yokohama Tire Retread Co., Ltd. (YTRH)
Vicinity of Lake Utonai
Habitats being safeguarded or restored Satoyama (traditional community-managed forest) conservation in Toyooka Village, Nagano Prefecture; Satoyama conservation in Tsuchiya district, Hiratsuka City, Kanagawa Prefecture; conservation of Caretta caretta (Loggerhead turtle) egg-laying sites along the Ominato Coast in Ise City, Mie Prefecture, and conservation of breeding grounds of Sialia sialis (Eastern bluebird) at Virginia Plant Satoyama (traditional community-managed forest) conservation in Toyooka Village, Nagano Prefecture; Satoyama conservation in Tsuchiya district, Hiratsuka City, Kanagawa Prefecture; conservation of Caretta caretta (Loggerhead turtle) egg-laying sites along the Ominato Coast in Ise City, Mie Prefecture, and conservation of breeding grounds of Sialia sialis (Eastern bluebird) at Virginia Plant
Total number of species included in the IUCN Red List of Threatened Species or in Japan’s domestic list of species requiring special conservation efforts

<Categories of threatened species>
・Critically endangered (CR)
・Endangered (EN)
・Vulnerable (VU)
・Non-threatened (NT)
・Least concern
Rivers receiving wastewater
CR+EN: Two species: Chara sp. (Stonewort), Anguilla japonica (Japanese eel) (Kaname River, Hinokijiri River)
VU: Two species: Oryzias latipes (Japanese rice fish) (each river) and Liobagrus reinii (Torrent catfish) (Tenryu River)
NT: Five species: Veronica undulata (Kaname River), Diplonychus japonicus (Ferocious water bug) (Sonobe River), Cottus pollux (Japanese fluvial sculpins) (Kuroda River), Pelophylax nigromaculatus (Black-spotted Pond Frog) (Tenryu River), Mauremys japonica (Japanese pond turtle) (Goten River)

On premises of plants and satoyama
VU: One species: Cephalanthera falcata
NT: Four species: Sasakia charonda (Great purple emperor), Psilotum nudum (Whisk fern), Calanthe discolor, Cynops pyrrhogaster (Japanese fire belly newt)
Least concern: One species: Vanellus cinereus (Grey-headed lapwing)

Beaches near to where wastewater flows out
EN: One species: Caretta caretta (Loggerhead turtle) (Ominato coast)
Rivers receiving wastewater
CR+EN: Two species: Chara sp. (Stonewort), Anguilla japonica (Japanese eel) (Kaname River, Hinokijiri River)
VU: Two species: Oryzias latipes (Japanese rice fish) (each river) and Liobagrus reinii (Torrent catfish) (Tenryu River)
NT: Six species: Veronica undulata (Kaname River), Macromia daimoji (Sonobe River), Diplonychus japonicus (Ferocious water bug) (Sonobe River), Cottus pollux (Japanese fluvial sculpins) (Kuroda River), Pelophylax nigromaculatus (Black-spotted Pond Frog) (Tenryu River), Mauremys japonica (Japanese pond turtle) (Goten River)

On premises of plants and satoyama
VU: One species: Cephalanthera falcata
NT: Four species: Sasakia charonda (Great purple emperor), Psilotum nudum (Whisk fern), Calanthe discolor, Cynops pyrrhogaster (Japanese fire belly newt)
Least concern: One species: Vanellus cinereus (Grey-headed lapwing)

Beaches near to where wastewater flows out
EN: One species: Caretta caretta (Loggerhead turtle) (Ominato coast)

Responsible Departments

Each business location
  • Activities are conducted by each office, with the Biodiversity Committee (which the Environmental Protection Promotion Department serves as a secretariat for) implementing company-wide policy discussions and activities.

Stance and Target

Why is “Biodiversity” a critical issue to be addressed?
Explanation of the reason and background

We are engaged in a business that is dependent on natural capital (the gifts of nature) including natural rubber. In addition, many production facilities use large quantities of water for the cooling of equipment, and emit heat and carbon dioxide. We recognize that the burden on the natural environment caused by these kinds of business activities is not unrelated to the loss of biodiversity currently proceeding on a global scale. We view efforts to preserve the links between the variety of life nature has blessed us with (= biodiversity) and to use natural resources in a sustainable manner and carry biodiversity on to future generations to be our responsibility.

Guidelines on Biodiversity

<Basic Policy>

In running our business, we rely heavily on nature’s blessings. We should pass on this rich nature to our future generations by addressing the preservation of biodiversity and utilization of sustainable biological resources through our business activities, whilst recognizing the fact that “linking diversified lives equals biodiversity”, which is the basis of nature’s blessings, has been dwindling rapidly on a global scale in recent years.

<Action Guidelines>

  1. Recognition as a Management Issue
    Since Yokohama Rubber is directly using biological resources and conducting business activities that may affect biodiversity, we recognize the importance and risks towards the grace of nature. Therefore we will address the preservation of biodiversity from a long-term perspective.
  2. Participation by All Employees
    We will raise the awareness of our employees in regard to the grace of nature. All our employees will contribute to the preservation of biodiversity both at work and their local communities.
  3. Determine the Effect on Biodiversity and its Reduction
    We will determine the effect that our business activities may have on biodiversity, and shall thereby try to avoid or minimize such effect.
  4. Preservation of Biodiversity through the Supply Chain
    In order to preserve biodiversity, by understanding that it is important to be considerate as early as the stage of resource extraction, we shall contribute to the preservation of biodiversity at resource mining sites through cooperation with relevant personnel of the supply chain.
  5. Sustainable Usage of Biological Resources
    We will work on any sustainable usage of biological resources by gathering knowledge with regards to biodiversity, and also through technological development, innovation of design and production, or approaches to biodiversity in the value chain.
  6. Information Sharing and Communication
    We will work on the information gathering or social requirement as to preservation of biodiversity; we shall thereby disclose our activities and achievements proactively to facilitate dialogue and tie-ups with our stakeholders, such as customers, local communities, NGOs, and the government.

Vision (attainment goal) / target

In the preservation of biodiversity, we evaluate the impact that our business activities have on the natural environment and upon ecosystems, and then implement conservation activities in order that this impact can be further mitigated. Additionally, we aim for harmony with nature and the development of employees with an awareness of the environment.
YOKOHAMA Forever Forest project achieved its goal to plant 500,000 seedlings in both our domestic and overseas production sites and related department sites in September 2017. Going forward, the project is working toward the new target of planting 1.3 million trees by 2030 through afforestation at production sites and related department sites and the provision of seedlings to communities.

<Overview of Yokohama Rubber’s Activities to Conserve Biological Diversity>

Measures for vision achievement

The locations of our offices differ in terms of geography, history, and culture. Because the living things that live at these locations also differ, we believe that it is necessary to assess the situation and establish issues for each office, and based on this we deploy our biodiversity conservation activities in stages. After gaining a general understanding of the environments surrounding offices, including waters, green areas, nature reserves, residences, and plants, we conduct surveys on the water quality of rivers that our business activities have an effect on, and monitoring of observed wildlife in the communities surrounding offices that have been surveyed, and specify the organisms subject to assessment. Through monitoring throughout the year, we assess the impact of our business activities, determine which organisms are subject to preservation, conduct preservation activities, and release the results.
In water quality surveys, we measure water temperature, electrical conductivity, pH, etc., and in the monitoring of organisms, we conduct bird observation, vegetation surveys, and observation of aquatic organisms and insects.

Move the screen to the left or right to see the table information

  Business location Location Water quality* Aquatic life Vegetation Wild birds Insect Other
In Japan Mie Plant Within premises
Outside premises Loggerhead turtle
Mishima Plant Outside premises
Shinshiro Plant Within premises
Outside premises Amphibians
Onomichi Plant Within premises
Outside premises
Hiratsuka Factory Within premises
Outside premises
Ibaraki Plant Within premises Creating an environment for Grey-faced buzzard
(Amphibians, Reptiles)
Outside premises
Nagano Plant Outside premises
Yokohama Tire Retread Hokkaido Plant Outside premises
Yokohama Tire Retread Nagoya Plant Within premises Biotope
Yokohama Tire Retread Onomichi Plant Outside premises
Yokohama Mold Outside premises
Overseas YTMT (Thailand) Within premises
YTRC (Thailand) Within premises
Y-CH (China) Outside premises Laojunshan Project
CHZY (China) Within premises
Outside premises
CSZY (China) Within premises
YTPI (Philippines) Within premises
Outside premises Watershed conservation
YTMV (United States) Within premises Mammals
YRPZ (Russia) Within premises Growth of pine trees
YTVI (Vietnam) Outside premises
  • Presence or absence of biodiversity activities

YOKOHAMA Forever Forest Project

A cumulative total of 607,000 trees have been planted as of the end of 2020. The cumulative total including the number of seedlings provided equates to 1,039,000 trees. This marks a 80% achievement rate for the target of 1.3 million trees by 2030. In order to assess forest growth and environmental changes, we conduct surveys on the amount of growth (measurement of tree height and diameter at breast height) and surveys on wild birds observed within plant premises. From surveys on the growth amount of seedlings we have calculated the fixed quantity of carbon dioxide from the YOKOHAMA Forever Forest Project and determined that the fixed quantity of carbon dioxide from the YOKOHAMA Forever Forest Project is higher than that for a typical broadleaf forest. This is likely the effect of the mixed planting and close planting of various kinds of trees.
In wild bird surveys at the Hiratsuka Factory, 60 species of wild birds have been observed on plant premises up until now. From the third year of tree planting, we began to see brown-headed thrushes that have a penchant for forests. We believe this reflects how the Forever Forest is functioning as it should as a forest for wild birds. In addition, we observed the crowned willow warbler and the great reed warbler that is seen near water, which suggests that the Forever Forest is functioning as a stopover for wild birds as they move throughout their habitat.

Review of FY 2020 Activities

Announcement of procurement policy aimed at maintaining natural rubber as a sustainable resource

Yokohama Rubber announced the Sustainable Natural Rubber Procurement Policy in October 2018 to make natural rubber a sustainable resource. In addition, we participated in the international platform GPSNR (Global Platform for Sustainable Natural Rubber) and started activities.
In 2019, Yokohama Rubber started survey of natural rubber farms in Surat Thani, Thailand, and have visited 223 farms. So far, we have not found any human rights violations or deforestation, but through the survey, we have learned about the issues faced by farmers and the problems to be solved. This survey will be continued and we plan to survey 500 households in total by the end of 2022.
In January 2020, Yokohama rubber signed a Memorandum of Understanding (MOU) with the Rubber Authority of Thailand (RAOT) to provide economic support for natural rubber farmers and improving traceability to ensure the transparency and soundness of the supply chain.

Communication with communities

Hiratsuka Factory has been holding open-house event “Think Eco Hiratsuka”. One of the programs was a panel discussion on biodiversity, which was held online In 2020. Under the theme of "Thinking about the connection between living things and our lives from the perspective of the nature in Hiratsuka", the panel discussion was attended by about 40 people, including employees, local residents, environmental NPOs, and this time, junior and senior high school students.

Employee education

We are working on biodiversity conservation through our business activities. In order to ensure that all employees are aware of the blessings of biodiversity and act accordingly, we are working to spread awareness of biodiversity among employees through personnel training.
One of the mandatory training courses for young employees covers biodiversity; in fiscal 2020, it was conducted via video-on-demand due to the spread of the COVID-19.

Introduction of Initiatives

Hiratsuka Factory

The Hiratsuka Factory comprises multiple divisions and departments, biodiversity conservation activities in the lower reach of the Kaname River provide a place for employee education.
The presence of birds including streaked fantail warblers, kingfishers, great reed warblers, bull-headed shrikes, and migratory fish including eels, rhinogobius, and gobies in the Kaname River are indicative that both the river and the nearby sea are healthy. However, investigations of the vegetation showed significant quantities of introduced species such as giant ragweed and burcucumber, and we decided that our conservation activities should include removal of specific introduced species.
As a result of the above activities, we were able to reduce the amount of specified alien plants, but the conservation effect, i.e., whether biodiversity was protected by reducing the number of non-native plants, was not clear.
Based on the review, we have decided to put an end to the conservation activities in the Kaname River.
(Monitoring will be continued)
Vegetation survey at Kaname River
Aquatic life survey at Kaname River
In March each year, at the invitation of the Kaname River Basin Watershed Network, we conduct river cleanup activities in collaboration with local government authorities and civic organizations.
In 2020, this event was cancelled due to the effects of the COVID-19.
In addition, We started activities to create a handmade biotope in a valley field by borrowing fallow land near Komagataki Falls in Tsuchiya district of Hiratsuka City and restore the neglected cedar forest around the valley in 2015.
With the cooperation of Kanagawa University, we have also started to conduct surveys on changes in illumination level due to cedar thinning in the same area.
We zoned the field into several plots, and decided on target species, activities, and the target image, so that we can understand the effects and goals of the activities.
Forest floor change in cedar forest and seedlings of deciduous tree
Trail camera set up in the forest
A Japanese raccoon appeared in the survey area
In May 2017, a “dragonfly pond” was made in the grounds of the Hiratsuka Factory through manual labor, and activities began to be held to enable people to experience for themselves our links with other living things by observing the dragonflies, butterflies, frogs etc. that congregate at the pond.
These activities to conserve biological diversity and our ongoing surveys of fixed amounts of CO2 absorption associated with the growth of the Forever Forest planted in and around the site in 2007 were recognized with Association for Business Innovation in Harmony with Nature and Community (ABINC) certification as a plant that is considerate of biodiversity in March 2017.
ABINC certification
We participate in the Hiratsuka Environmental Fair organized by Hiratsuka City and the Biodiversity Forum organized by environmental groups, and introduce the biodiversity activities of the Hiratsuka Factory to the local community.
Last year, unfortunately, due to the influence of COVID-19, the exhibition was cancelled and only the booklet was published.
Cover if the booklet of the 20th Sagami Nature forum
Including participation in the Hiratsuka Biodiversity Promotion Council, a biodiversity initiative promoted by Hiratsuka City, we are also expanding activities for ecosystem conservation in Hiratsuka.

Mie Plant

Three teams are continuing to implement biodiversity conservation activities as follows.
  • “Black Team”: Surveying water quality and aquatic organisms such as Japanese Ricefish in rivers discharged from the plant (Hinokijiri River and Hotosu River)
  • “Noppo Team”: Removing alien species and measuring the number of native plants, and surveying the spawning of loggerhead turtles (Caretta caretta) on the coast (Ominato Coast) where the water flows downstream
  • “Chibikko Team”: Creating a biotope in the plant's regulating pond, surveying water quality, insects such as dragonflies, aquatic organisms, and vegetation
In 2020, we were not able to hold the annual on-site class by our employees at Ominato Elementary School. We brought a picture-story show for environmental education to the Ominato Elementary School and the teacher talked about tree planting to pupils. As the Ominato Elementary School was closed and moved to a new school, the school, the local government, and ourselves are working on how to make the on-site class an issue in 2021.we will discuss how to conduct the delivery class in 2021.
Due to the CONID-19, we were not able to hold our annual tree planting and biodiversity conservation activities, but we will make preparations to hold them in 2021.
On the other hand, we are also preparing to hold the semi-annual activity report meeting in spite of the COVID-19.
Aquatic life survey at Hinokijiri River
A school teacher explained the meaning of tree planting using a picture-story show at Ominato Beach.
Living creature observation in biotope inviting elementary school students

Mishima Plant

The factory discharges water into the Goten River, and we had three teams —“Dozeu Team,” “Suppon Team,” and “Unagi Team”— carry out ongoing surveys into water quality and wildlife.
In the Goten River, it has been confirmed that a wide variety of living creatures live in the river, including dragonfly nymphs (e.g. Calopteryx atrata, Macromia amphigena), fish (e.g. Opsariichthys platypus and Nipponocypris temminckii), reptiles such as Soft-shelled turtle and Chinese pond turtle and birds such as Kingfishers, which are rare in a factory surrounded by houses.
On the other hand, there is a lot of garbage dumped in the river, and we have been cleaning the river after monitoring in order to contribute in some small way to keep the Goten River beautiful.
However, river vegetation was wiped out by river dredging at the end of 2016, and the diversity of the river disappeared.
Therefore, in May 2019, the Numazu Civil Engineering Office of Shizuoka Prefecture, Mishima City, and the Mishima Plant signed a River Friendship agreement, and in 2020, we conducted activities with government participation twice a year to regenerate vegetation and create a comfortable environment for aquatic life in the Goten River.
In addition, as a result of cleaning up the agricultural waterway in front of the main gate of the plant, fireflies began to inhabit the river in 2012, and a firefly viewing party was held every year in May, which was attended by about 200 people every year, but we had to cancel it in 2020 due to the COVID-19.
River restoration work based on the River Friendship Agreement
River restoration work based on the River Friendship Agreement

Shinshiro Plant

In 2020, biodiversity conservation activities kicked off with a total of 75 people from three teams working at three sites in the water source area: Yotsuya Rice Terraces, Noda River and Kuroda River, and the biotope in the plant. However, due to the effects of the COVID-19, we had to do limited activities in a short period of time with a limited number of 4 to 5 people (each team leader plus the secretariat), so we could only conduct water quality surveys and some biological monitoring.
<Yotsuya Rice Terraces, Shinshiro City: One of the water source areas of the Toyokawa River>
As a water source for the industrial cooling water, we are working to secure a habitat for biotic communities, help maintain clear streams and near threatened species, protect and restore water-related ecosystems, and support a desirable ecological habitat in the rice terraces.
Creatures to be protected: Near Threatened (NT) species such as Japanese fire belly newt (Cynops pyrrhogaster) and Forest Green Tree Frog(Zhangixalus arboreu).
<Noda River and Kuroda River: Water Quality and Aquatic Life Monitoring Survey>
We confirmed that the wastewater from the two plants did not have any adverse effects on the local water quality and aquatic organisms, and conducted activities to continue to maintain the conditions.
<Biotope in the plant>
Maintenance of the biotope in the plant was carried out. We protected and restored water-related ecosystems, and observed whether the environment in the plant was habitable.
Although the tree-planting activity organized by the Shinshiro Shitara Ecosystem Network Council had to be cancelled due to the COVID-19, we were able to show the details of our past activities through a panel display (Lobby of Shinshiro City Hall).

Onomichi Plant

At the Onomichi Plant, we are carrying out surveys of water quality and of aquatic life, birds, and plants at the Nishifuji Shinsui Park on the Fujii River, as well as observing wild birds and insects within the plant premises.
Surveys of aquatic life in the Fujii River found aquatic insects including Ephemera strigata, dragonfly nymphs such as Mnais costalis, and Asiagomphus melaenops, fish such as Gnathopogon elongatus and Rhinogobius nagoyae and crustaceans such as Eriocheir japonica and Palaemon paucidens.
Within the plant premises, a mosaic of different environments for living creatures is provided by the growth of the Forever Forest, bushes, grassland, rain fed ponds and wetlands, which provide habitats for dragonflies, butterflies, crickets and grasshoppers. It was also shown that the factory site contributes to the nesting of larks, the formation of territories of Lanius bucephalus and Phoenicurus auroreus, and the wintering of Horornis diphone.
The 44th Fujii River Evening Event, which was scheduled to be held in June 2020, was cancelled due to the COVID-19, and the distribution of 300 saplings was postponed until next year.
In addition, in 2020, we submitted an application for the renewal of the Certification of Association for Business Innovation in harmony with Nature and Community (ABINC), and received the renewal of the certification in February 2021.
Bird watching at the plant
Bird watching at the plant
Bird watching at the Nishifuji Shinsui Park

Nagano Plant

The Nagano Plant is located in an area that is highly natural compared to other Yokohama Rubber plants. As there is almost no drainage other than rainwater, we believe the environmental impact of this plant is low compared to other plants of Yokohama Rubber.
Loach catfish, which is a Vulnerable species, and stonewort, which is a endangered flora were found during surveys into aquatic life at the area with our Nagano Plant located that is near the confluence of the Tenryu River and its tributary, the Oshima River, as well as at the Shinsui Park on the Terasawa River.
In accordance with the "Forest Foster Parent Promotion Project" promoted by Nagano Prefecture, we have signed a "Forest Foster Parent Agreement" with Toyooka Village to cooperate in the maintenance of the village forest in Toyooka Village, and are carrying out conservation activities.

Ibaraki Plant

At the Ibaraki Plant, we conduct surveys on water quality, vegetation, aquatic life and birds on the Sonobe River where factory wastewater is discharged to. Because the Sonobe River is used as agricultural irrigation water, we take great care in safeguarding the quality of discharge water. Because electrical conductivity is lower and transparency is higher in the water at the plant water discharge area than in other stretches of the Sonobe River, we believe that plant wastewater management is acceptable. A water tank has been installed at the entrance to the plant offices; fish caught in the Sonobe River are able to live in the tank, which contains discharge water from the plant. In the aquatic life survey, the dragonfly nymph of Macromia daimoji, which is a near threatened species (NT) in the category of the Ministry of the Environment, was confirmed.
We started surveying birds at the plant in 2015, and have been continuing our survey activities as well as conservation activities at Sonobe river. By comparing the results of our observations with those of the Sonobe River and considering the differences in the environment, we have become more familiar with the creatures around us.
Starting in 2019, we have organized a new "Survey on the Living Environment of the Grey-faced buzzard(Butastur indicus)" to survey the vegetation and small animals (amphibians and reptiles) in the plant, focusing on the Grey-faced buzzard, which is as a Vulnerable, as one of the indicators for environmental conservation.
These activities have been carried out with guidance from the Wild Bird Society of Japan (Ibaraki Office), and from the Omitama Wildlife Association. The activities implemented at the Ibaraki Plant to safeguard biodiversity have been featured on the Omitama Wildlife Association’s website.
In recognition of the above activities, we participated in the poster session of the World Lake Conference (Lake Kasumigaura, Ibaraki, Japan, 2018) held at the Tsukuba International Congress Center in October last year.
In 2020, as a measure to prevent the spread of the COVID-19, the number of outside participants (including affiliated group company) was limited, and activities were conducted mainly by employees within the plant.

Wild bird survey at Sonobe River

Aquatic life survey at Sonobe River

Habitat survey of Grey-faced buzzard (collecting insects)

Dragonfly nymph of Macromia daimoji

Yokohama Tire Retread Co., Ltd. Hokkaido Plant (YTRH)

Located adjacent to Lake Utonai, an internationally famous migratory bird gathering place where the Wild Bird Society of Japan opened the first sanctuary in Japan, YTRH is the only factory in the Yokohama Group that is in this kind of precious environment.
In order to protect this special place, we have been conducting clean-up events from April to November as a conservation activity for Lake Utonai since 2017, and we conduct foreign plant extermination activities in the summer.
The "Invasive Alien Plant Extermination Activity," which started as an annual event in 2017, had eight participants at the beginning, but the number increased to 14 in 2018 and 18 in 2019 by gathering volunteers from the CSR Division, Yokohama Tire Japan (a dealer), sales warehouses, and families. In addition, the number of alien plants pulled out increased to 3,000 in 2017, 7,770 in 2018, and 1,9683 in 2019, making our activities more dense.
In 2020, most of the events were cancelled due to the effects of COVID-19, but we managed to avoided three Cs and carried out the "Invasive Alien Plant Removal" with the plant head, other two from the plant, and a ranger from the Wild Bird Society of Japan.
<Events in Tomakomai City>
♦Spring Cleaning Month "Zero Garbage Day" on Sunday, April 18
All YTRH employees were scheduled to participate in the clean-up activities around the Utonai Lake Sanctuary, but the event was cancelled due to the COVID-19.
♦Autumn Cleaning Month "Zero Trash Day" October 18 (Sun)
All YTRH employees participated in the cleanup around Lake Utonai.
We collected a large amount of trash as the cleanup was more extensive than usual.
The area around Lake Utonai was cleaned up.
The year of 2021 marks the 40th anniversary of the opening of the Lake Utonai Sanctuary by the Wild Bird Society of Japan.
According to the rangers of the Lake Utonai Sanctuary, the Conservation Project Office of the Wild Bird Society of Japan, there are plans for activities such as the "Calling Blakiston's Fish Owl (Ketupa blakistoni) Project" and the "Calling Japanese crane (Grus japonensis)Tanager Project”.
All employees will continue to work together on environmental activities and sanctuary support activities at Lake Utonai, and will also continue to engage in meaningful activities together with their families, people from affiliated companies, and the Wild Bird Society of Japan.
Migratory birds at Lake Utonai
Pulling out giant goldenrod(Solidago gigantea var. leiophylla) around Lake Utonai
Cleanup work around Lake Utonai

Yokohama Tire Retread Co., Ltd. Saitama Plant(YTRS)

Yokohama Tire Retread Saitama Plant has been participating in the activities of Miyoshi Green Support Team since November 2015. The Miyoshi Green Support Team is working under the slogan of "Creating a livable city through the conservation and maintenance of flatland forests, with the aim of building a rich rapport. Activities are held on the third Sunday of every month, with about 20 local residents and companies participating each time. In the "Fujikubo Flatland Forest," the recycling method of making compost from fallen leaves that has continued since the Edo era (environment with historical value) and biodiversity (rich natural environment) are present to today. In 2015, a part of the activity area was certified as the Green Trust Conservation Area No. 14 of Saitama Prefecture. The Green Trust is an initiative to preserve the outstanding natural and historical environment of Saitama Prefecture by converting it into public land with the cooperation of residents, companies, and organizations in order to preserve it for future generations.
Cutting down and clearing away dead trees (July 19, 2020)
Pulling weeds and picking up litter in Satoyama (April 18, 2021)
Making compost from fallen leaves... Many beetle larvae are living in the compost.

Yokohama Tire Retread Co., Ltd. Nagoya Plant(YTRN)

Since 2020, we have been participating in local environmental conservation activities as a new effort to address biodiversity conservation. There is a valuable ecosystem in the headwaters of the Sakaigawa River in our neighborhood, and we are working with local residents to preserve and monitor the environment and publicize our activities to a variety of people. By observing insects, plants, birds, etc., and by learning and communicating about the changes in seasons and the various activities of the seasons, we share with local people the importance of the nature that must be preserved and deepen their understanding of biodiversity. By sharing what we have learned from the activities with many people, we continue to develop human resources and contribute to biodiversity activities and environmental conservation.
Creation of a biotope in the headwaters of the Sakaigawa River
Reclamation of fallow fields
Maintaining Satoyama and Wetlands

Yokohama Tire Manufacturing (Thailand) Co., Ltd. (YTMT)

Yokohama Tire Manufacturing (Thailand) Co., Ltd. (YTMT), a tire plant in Thailand, is located within an industrial park. Because water intake and discharge is centrally managed at industrial parks in Thailand, unlike the plants in Japan, it is not possible to confirm the impact of individual plants on water intake and discharge areas. For this reason, we monitor birds and insects in order to assess the green areas (Forever Forests and biotopes) on plant premises. In order to recreate a rich ecosystem within the plant premises, we are creating two types of biotope—marshes and ponds. We have been carrying out further planting in order to preserve the connection between aquatic and land wildlife. We also secure habitats for local species and conduct environmental education for employees through these activities.
Additionally, we carried out activities to create areas of saline soil, with the aim of helping preserve the wildlife within the Khao Yai National Park, a world heritage site.
Insect survey in biotope
Insect survey in biotope
Acraea violae

Y.T. Rubber Co. Ltd. (YTRC)

YTRC is located in Surat Thani Province in southern Thailand, and is the only natural rubber processing plant in the Yokohama Rubber Group. A lot of water is used in the natural rubber manufacturing process, but YTRC has realized the effective use of water resources by 100% water recycling. We have also reduced the total amount of water usage by automating the appropriate adjustment of water usage according to the increase and decrease of production volume, and at the same time, we are striving to reduce energy consumption, as well as improving the efficiency of sedimentation and purification ponds to maintain the water quality at the same level as that of nearby rivers.
There is a large buffer pond on the site, and including the surrounding area, we are striving to maintain the natural environment that existed before the plant was built. Since November 2014, we have been monitoring the fish habitat and water quality in the pond on a monthly basis. When the water level rises during the rainy season, the pond is connected to the nearby Tapi River. In a recent survey, three new species of fish were confirmed breeding in addition to the existing 18 species.
In the forest surrounding the pond, 21 species of birds have been observed so far. In the future, we will continue to consider the environment of the Tapi River and the buffer pond as an integral part of the environment, and will not only maintain and improve the water quality, but also conduct activities including the release of appropriate species of fish.
Biodiversity activity at buffer pond
Fish catching survey using throwing net

Hangzhou Yokohama Tire Co., Ltd. (CHZY)

CHZY is located in an industrial park in Hangzhou, China. Although the industrial park has a green belt, it is not rich in diversity due to the small number of tree species. For this reason, we are conducting a survey to evaluate the Forever Forest and its inhabitants in the hope that CHZY's Forever Forest will become a habitat for forest creatures. In order to create a more favorable ecological environment, on March 12, 2020 (the day of the tree-planting ceremony), the company managers participated as team members to go around the perimeter of the company to pick up litter.
As part of the government's environmental protection program, CHZY has been entrusted with the management of a 2,000-square-meter plot of land in the vicinity of the CHZY site as the "Yokohama Reserved Forest”. A total of 20 trees were planted in 2020, bringing the total number of trees planted so far to 120.

Yokohama Tire Philippines, Inc. (YTPI)

Yokohama Tire Philippines, Inc. (YTPI) is situated in the Clark Special Economic Zone in Pampanga, Philippines, so it is not near any sizable wooded areas. YTPI contributes to biodiversity conservation by providing habitats for wild birds, insects, butterflies and specific reptiles by planting and growing trees both on and off the factory grounds. We observe the growth of these living things and plants so that their safety and comfort can coexist with that of employees.
In addition, YTPI creates educational materials and holds meetings to raise employee awareness of forest and biodiversity conservation. In order to promote the improvement of the ecosystem in the vicinity, seedlings are provided to the local community, and we hold and participate in tree planting activities outside the factory.
Angeles City, adjacent to YTPI, is considered an “urbanized areas where water use due to intensive consumption is critical” indicated by the Japan International Cooperation Agency (JICA), and the water shortage level is evaluated as “critical” in a report by the environmental NGO Greenpeace.
Angeles City is said to be at risk of having water shortages by 2025. Because of this, at the request of Angeles City’s mayor Edgardo Pamintuan, an activity to plant 1 million trees in Sapang Bato, a water source area, was launched to restore the city's basin. YTPI supports this activity and participates in tree planting activities in this area.

Yokohama Tire Manufacturing Virginia(YTMV)

YTMV is located at the foot of the Appalachian Mountains of Virginia in the eastern United States. The area offers a vibrant natural environment similar to Japan where you can experience four distinct seasons. The growth of the Forever Forest planted at the company’s factory has provided a natural habitat for a large variety of wildlife and wild fowl. We are carrying out activities to balance conservation of this natural environment and our production activities.
Since 2015, we have set up nest boxes to protect the breeding of the Eastern bluebird (Sialia sialis), and all employees watch over the baby birds as they grow.
Nest for Eastern bluebird
Eastern bluebird

Suzhou Yokohama Tire Co., Ltd (CSZY)

At Suzhou Yokohama Tire Co., Ltd (CSZY) located in a chemical industry area of Suzhou, China, we launched biodiversity activities jointly with the New District Environmental Protection Council and a Xuguan Town elementary school in December 2016. In 2019-2020, CSZY was recognized by Jiangsu Province as a "Provincial Environmental Protection Credential Enterprise".
In 2020, we held biodiversity survey activities three times (May, October, and November) at the environmental education base in our factory, with the participation of pupils, their families, teachers from Jing'en Experimental Primary School, and CSZY employees (163 people in total). Biodiversity survey activities enable us to understand the status of the biological environment within the plant site, and also help us to preserve the local ecosystem and harmonize with the local community while conducting business activities at the plant.
In these activities so far, we have observed birds such as sparrows and egrets, plants such as Chinese tallow trees, hall’s crabapples, border privets, dandelions, morning glories, and daisies, insects such as bees and butterflies, and earthworms. We also picked up tree seeds in the activities and grew them as seedlings for our Forever Forest activities. In these survey activities, we not only observed these living creatures, but also learned about the growth of the Forever Forest, which was a good opportunity to deepen our understanding of how the growth of the forest has a positive impact on the local ecosystem.
Everyone who participated in biodiversity activities
Children at Jing’en Experimental Primary School observing living organisms

LLC Yokohama R.P.Z.(YRPZ)

In 2017, we initiated joint research with Voronezh State University of Forestry and Technologies into planting one species of pine tree (Pinus SylvestrysL.) on the premises of our plant. The purpose of this activity is to research how much pine trees will grow in an industrial belt and restore YRPZ’s biodiversity. In addition, this activity has been appraised as a biodiversity research activity. YRPZ and forest science experts from Voronezh State University of Forestry and Technologies are now researching the ideal conditions for the growth of trees. Additionally, we invite children from local schools to help plant oak seeds cultivated by YRPZ.
Tree planting
Planted pine seedlings

Yokohama Tyre Vietnam Inc.(YTVI)

YTVI started an internal tree planting project with the Southern Institute of Ecology (SIE) at Lo Go - Xa Mat (LGXM) National Park in 2018, utilizing the expertise of the Forever Forest activities at the plant site. We have planted 500 trees of 7 different indigenous species on 1 hectare of land. It has been confirmed that the planted trees have formed a canopy over the past three years and the number of animal species living in the forest has been increasing every year. A total of 94 employees, from board members to new recruits, have been working to protect the planted trees and conduct surveys over the past three years, and in 2020, we took charge of the biannual survey in October and replanted the dead trees.

Issues and Future
Improvement Measures

Up until now, activities have focused on assessing the species that live in areas affected by the business activities of the Yokohama Rubber Group. In the future, we will expand activities to include overseas business locations, and maintain and improve biodiversity in areas where our businesses are located with the aim of realizing sustainable operations.
Because biodiversity is a concept that people in general are still not familiar with, we will enable employees to deepen their understanding of the importance of biodiversity conservation through participation in monitoring activities and conservation activities, and we will actively communicate information to local communities to provide a better understanding of our efforts.