Mishima Plant (SP)

Business activities

Production of tires for passenger cars, race cars and light trucks

Total site area

112,000 m2

Number of employees

896 (December 2018)


8-1 Minami-Futsuka-machi, Mishima City, Shizuoka 411-0832, JAPAN

Contact for consultation and complaints

Mishima Plant Operation Division
Tel: +81-55-975-0800
Fax: +81-55-976-4322

Message from the General Manager

Toshinari Matsumoto

The Mishima Plant is located in Mishima City in the North Izu area of Izu Peninsula UNESCO Global Geopark in eastern Shizuoka Prefecture. The World Heritage Site Mt. Fuji can be seen to the north of this location that is blessed with magnificent views and abundant nature. The plant mainly manufactures tires for passenger cars and light trucks. We also produce racing tires for motor sports.

The plant is surrounded by clear water that is part of the natural abundance of Mt. Fuji and the Izu Geopark, and thanks to the tree planting of the Yokohama Forever Forest Project that the Yokohama Group has been engaged in since 2007, it has been possible to see fireflies in the early summer in the tree planting areas in front of the plant in recent years. Meanwhile, residential areas have been developed in the area surrounding the plant as a result of the convenience of the proximity to the Mishima-Futsukamachi Station on the Izuhakone Railway, which means that in addition to control and management of exhaust, drainage, and sound, response to sensory issues such as odors is required, and these are being steadily addressed.

While Yokohama Rubber is aiming to contribute as a member of the global community, the plant is aiming to contribute as a member of the local community.

We would like to foster the abundant natural wealth of the region through participation in clean-up activities around the plant and the Rakujuen section of the Izu Geopark that are currently underway as well as environmental conservation and observation through environmental conservation near the IzuJukan Expressway/Tamazawa IC and biodiversity activities at the Goten River that flows along the west side of the plant.

In the future as well, we will work hard to build trusting relationships with all stakeholders in an aim to be a plant that is loved by the region.

Organizational Governance

Corporate Governance and Compliance

Adhering to the vision of “deal fairly with society and value harmony with the environment” outlined in the Yokohama Rubber management philosophy, the Mishima Plant has adopted an environmental strategy that aims to make the plant a core factory of a company having world-class strengths in technologies for protecting the environment and has implemented various activities to realize this goal. The Mishima Plant has made the deepening of communication with stakeholders and efforts to make a positive contribution to the local community and to society as a whole an important part of its strategy.
In the future, the Mishima Plant will continue to implement environmental improvements through proactive management, by strengthening environmental management systems, taking effective steps to prevent environmental pollution and sensory discomfort, and implementing regular retrospective examination of past environmental problems and “near-misses.”

Corruption prevention

In working to give employees a thorough understanding of our compliance policies as such relate to the prevention of quality fraud, education in compliance issues has been conducted for the entire workforce.

Human Rights

Education on respect for human rights

We distributed “compliance cards” to all employees so as to enlighten and educate them about human rights.
We offer employment irrespective of gender, age or disability.

Promotion of employment of people with disabilities and workforce diversity

The Mishima Plant recruited two additional disabled employees during the period from January to the end of December 2018, making for a total of 12 disabled persons currently employed at the plant. As of December 2018, of a total of 896 employees at the plant, 34 are women, and 31 are elderly individuals (persons aged 60 or over).

Labor Practices

Occupational safety and health

Recognizing that securing the safety and health of our employees and employees of partner companies are the foundations of corporate activities, the plant acquired OSHMS (Occupational Safety and Health Management System) certification in November 2010 as a means to realize a safe, healthy and comfortable workplace. We will strive toward reducing risks, by sorting risks through risk assessment activities and countermeasures for and improvement of sorted risks, based on 3S activities in which all employees participate.

Employee diversity

Two employees took childcare leave in 2018, while another 16 utilized the system of maternity-childcare leave.

Work-life balance

The second and fourth Fridays of even month are designated as “Happy Family Life Days,” and employees are encouraged not to work overtime on these days.

Human resources cultivation and training in the workplace

To enhance the know-how and skills that employees need to do their jobs effectively, the Mishima Plant implements employee education and training at different levels depending on how many years of work experience each individual employee has and what position he or she holds. Planning is undertaken to ensure that we implement the right training at the right time; in 2018, a total of 55 employees received group training, while another 14 employees underwent managerial training unique to the Mishima Plant. Accordingly, a total of 69 employees underwent training during the course of the year.

The Environment

Environmental management

In line with our principle of “Deal fairly with society and value harmony with the environment”, we declared an environmental policy, adopting the environmental management system of ISO 14001. In order to reduce the environmental burden, we established reducing industrial waste and reducing greenhouse gas emissions as major tasks and actively strive to improve our production process and eliminate energy waste. As regards other measures, we established autonomous management targets to respond to legal regulations and operate within the autonomous management targets. Regarding efforts to combat sensory discomfort such as noise, vibration and odor, we asked 25 people in four municipalities living near the plant to participate as environmental monitors (as of December 2018). With their cooperation, we conducted home visits once a month in order for them to report on their situation when at home and for us to hear their views. Such activities could be linked to improvements being made.
As our efforts to contribute to the regional environment, besides the Yokohama Forever Forest Project, our company-wide activity for tree-plantings that have resulted in the planting of 28,759 saplings (as of December 2018), we have also been involved in plantings at the Otsuchicho School in Otsuchicho, Iwate Prefecture, at the Kibo no mori tsukuri (‘creation of a forest of hope’ to protect lives) in Kakegawa City, and at ramps of the Tamazawa interchange on the Izu-Jukan Expressway administered by the Ministry of Land, Infrastructure, Transport and Tourism.
In addition, we held a picture-story show and a hands-on activity to plant trees for environmental education for the third-grade students at the nearby Mukaiyama Elementary School that have been our regular events in every October since 2015, and around the plant we provided support to a summer night festival held by local communities as well as seedlings for local park improvement.

Activities at Mukaiyama Elementary School

Concerning the protection of biodiversity, we have conducted team surveys of the upper, middle and lower reaches of the Goten River (in our neighborhood). Those activities have involved measurements of water quality, ecological observations being undertaken, as well as general clean-up activities. Furthermore, as a result of our efforts in cleaning up the agricultural irrigation channel in front of the factory’s main gate, fireflies have started to inhabit the area since 2012. That development has allowed for firefly viewings to be held every May. This year, we welcomed 180 visitors to the event. In the future, we intend to build on such biodiversity protection activities.

Kakegawa City Kibo no mori tsukuri (‘Creation of a forest of hope’ to protect lives)

Biodiversity conservation activities

Firefly viewing activities

Environmental data

Reductions in greenhouse gas emissions

Greenhouse gas emissions
  • The base year is deemed as 1990 except for HFC, PFC and SF6, where the base year is 1995 as per the Kyoto Protocol.
  • Method of calculation of greenhouse gases (GHG): this is in compliance with the “Calculation and Reporting Manual for Greenhouse Gas Emissions” issued by the Ministry of the Environment and the Ministry of Economy, Trade and Industry.
    Note that GHG emissions associated with purchased electric power in FY2009 were calculated using the Table of Emission Coefficients by Power Company (Ministry of the Environment).

Effective use of resources / Reduction of waste

Waste output
Water usage

The plant derives 90% of its total water usage from underground water. The remainder is from city waterworks.

Measures for discharge into water, air and soil

Data related to water contamination

The water used at the plant is discharged into the Goten River after being treated in the plant’s treatment facilities.

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

Item Regulatory values Voluntary standard values FY2018 results
Average Maximum Minimum
PH *5.8–8.6 6.2–8.2 7.4 7.8 6.9
BOD concentration (mg/l) 15 4 or less 1.4 3.7 0.6
COD concentration (mg/l) ★120 5 or less 1.8 3.4 0.5
SS concentration (mg/l) 20 8 or less 1.0 2.0 1.0
Oil concentration (mg/l) 2 1 or less Less than 1 1.0 Less than 1
Air pollutants (NOx, SOx)

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

Substance NOx SOx
Amount of emission (t/year) 12.8
Facility Substance Regulatory values Voluntary standard values FY2018 results
Average Maximum Minimum
Mishima Plant
Soot and dust (g/m3N)
Mishima Plant Boiler NOx*2(ppm)
Soot and dust (g/m3N)

Reporting on chemical substance management status (Pollutant Release and Transfer Register (PRTR) Law compliance)

The Mishima Plant verifies whether secondary materials and auxiliary materials contain chemical substances subject to Safety Data Sheet (SDS) requirements, and in the case of substances where the amounts handled exceed the thresholds specified by the PRTR Law, annual reports are submitted to the national (or prefectural) authorities and safety impact assessment is performed.
Regarding the handling of substances pursuant to the PRTR Law, please refer to the Safety Evaluation Table of Domestic Production Bases.

Fair Operating Practices

Relationship with business partners

A CSR study seminar was held for the benefit of suppliers:

Consumer Issues

Communication with customers

To customers who tour the plant, we introduce our acquisition of the Automotive Industry Quality Management System Standard ISO/TS 16949.
Furthermore, in response to inquiries received from customers to whom we have delivered products, we make reports to them based on our quick investigation of the relevant matters.

Community Involvement and Development

Responses to comments and complaints received

We have held plant visits for both ordinary residents and environmental monitors living in the vicinity of the plant. At these events, the visitors received presentations regarding our environmental measures, etc.
At the Mishima Plant, the Environmental Affairs Office (which serves as the contact window for communication with the local community) engages in the exchange of views with the local residents serving as environmental monitors; in 2018, the Office conducted 248 interviews (97 of which were telephone interviews). Most of the points raised related to vibration, noise and odors.
In addition, two Resident Consultation Meetings (Factory Tour Meetings) for local residents living in the vicinity of the Mishima Plant were held, in June and November 2018.
Thanks to effective explanations of the Mishima Plant’s environmental measures and a willingness to listen to local residents’ views, in 2018 there were no complaints from local residents.

Resident Consultation Meetings with local residents

Relationship with local societies

Plant tours and workshops

In fiscal 2018, we accepted 81 factory tours with a total of 1,195 persons visiting the Mishima Plant. In support of regional education, we gave factory tours to elementary school students. We also offered workplace experience activities for junior high school students, and accepted high school students for internships, etc.

Plant Tour Information

When: Plant tours are offered on days on which the plant is in operation (Mondays to Fridays).
Excludes year-end and New Year holidays and the consecutive holiday periods in May and August.
Hours: 8:00 a.m. to 4:00 p.m.
Contact: Mishima Plant, Operation Section Tel: +81-55-975-0800