We would like to express our sincere gratitude for your patronage and support for our business activities.
Our company is engaged in technical services for social infrastructure such as power generation equipment and ships, and each business is supported by a wide range of specialized technology and on-site capabilities in electrical control systems, thermal control systems, and mechanical systems.
With these as our "strengths", we respond to the various needs of our customers and obtain satisfaction, which leads to the joy and sense of accomplishment of each employee and the desire to become a better company.
I think that the field of AI utilization will expand rapidly due to the development of information technology, but it is important to secure and nurture "human resources" and continue to inherit technology for businesses that can be completed only with the involvement of people. Through this business, we are working to develop field engineers who are trusted by our customers.


Growing with customers while creating value through our business


  • ● We provide the highest value products and services that reflect the needs of our customers.
  • ● We are delighted to provide services that truly please our customers.
  • ● Work earnestly with sincerity, creativity, and enthusiasm.
  • ● Continue to have transparency and norms.
  • ● Continue to have the ambition to challenge.

We will endeavor to gain further trust and satisfaction through these policies.
We look forward to your continued support and guidance in the future.

President and CEO

Yoshinari Nakamura

Corporate Profile

Corporate Name Boltech Co., Ltd.
Head Office 2-8-13 Okano, Nishi-ku, Yokohama
President and CEO Yoshinari Nakamura
Main activities Sales of products and services for marine vessel and plant
Founded September 18, 1966
Capital 30 million yen
Stockholder Nippon Yusen Kabushiki Kaisha
Total assets 2.64 billion yen (fiscal year ending March 2021)
Number of Employees 150
Member organization The Ship's Electric Installation Contractors' Association of Japan
Yokohama Naka Corporation Association
The Kobe Chamber of Commerce& Industry
Main bank MUFG Bank, Ltd.
Mitsubishi UFJ Trust and Banking Corporation
The Minato Bank, Ltd.
The Bank of Yokohama,Ltd.
Construction license General Construction Industry Minister of Land, Infrastructure, Transport and Tourism permission (general 21) No. 23061
General Building, Scaffolding, Earthwork and Concrete, Electrical , Plumbing , Steel Structure , Machine and Equipment Installation
Acquisition certification ISO9001: 2015 (Electricity Division / Machinery Division)

Quality Policy

Boltech Co., Ltd. has the following as our policy, Seven Stars, in all of our activities.

  • ★. Provide high value-added products and services to customers, which is the purpose of quality activities.
  • ★. We give top priority to improving customer satisfaction and ensuring quality.
  • ★. Providing the required quality at the optimum cost.
  • ★. We have sincerity, creativity, enthusiasm, and norms, and we value and respect the demands of our customers and society.
  • ★. The Highest-Quality Service The goal is to be recognized as The Highest-Quality Service Provider.
  • ★. Educate, train and motivate QMS for all employees.
  • ★. Make effective use of QMS, review it, and strive for continuous improvement.

July 1, 2019

President and CEO

Yoshinari Nakamura

Organization chart


July 1, 2021

List of qualified persons (main qualifications only)

Jurisdiction agency Qualification Number of people
Ministry of Internal Affairs and Communications Fire Defense Equipment Officer (Class A / Class B) 5
Certified Hazardous Material Handling Supervisor 24
Ministry of Health, Labour and Welfare Health officer’s license(Class-1) 4
Boiler expert’s license(Class-2) 12
Ministry of Economy, Trade and Industry Chief electrical engineer(class-3) 2
First-type electrical work engineer 7
2nd-type electrical work engineer 21
Ministry of Land, Infrastructure, Transport and Tourism First-Class (2nd-Class) Electric Works Execution Manager 3
Certificate of qualification for managing engineer 3
Fire and Disaster Management Agency Inspector of the Fire Protection Equipment and System 14
Battery Association of Japan Qualified person for maintenance of storage battery equipment 5
Qualified person for maintenance of storage battery equipment Private power generation equipment specialist engineer 34
The Ship’s Electric Installation Contractors’ Association of Japan Private power generation equipment specialist engineer 26
Chief Ship Electrical Engineer 6
Manager of Ship Electrical Engineer 2
The Japanese Society for Non-destructive Inspection Non-destructive test technician (PT penetrant inspection) 11

October, 2021

List of business establishments

Head office

2-8-13 Okano, Nishi-ku, Yokohama-shi, Kanagawa
Representative TEL: +81-45-290-6085
Electrical Division FAX: +81-45-290-3305
General Affairs and Accounting Department FAX: +81-45-290-3317

5 minutes walk from Hiranumabashi Station on the Sotetsu Line

Yokohama office

1-2-2 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa
Technical Group & General Affairs Group TEL: +81-45-461-6971 FAX: +81-45-453-6171
Reefer Group TEL: +81-45-900-7771 FAX: +81-45-440-5098
Sales group TEL: +81-45-900-7733 FAX: +81-45-440-5098

7 minutes walk from Koyasu Station on the Keikyu Line

Kobe office

1-2-3 Nishidemachi, Hyogo-ku, Kobe City, Hyogo Prefecture
Electrical Division TEL: +81-78-651-6031 FAX: +81-78-671-7821
Engine & Machinery Division TEL: +81-78-651-2727 FAX: +81-78-681-1386

15 minutes walk from Kobe Station on the JR Tokaido Line