A company linked to society and connected to the world

Only a manufacturer specializing in custom-made products is capable of developing the world’s most advanced technologies. We maintain a consistent manufacturing system encompassing all aspects from design and casting to manufacturing and maintenance. Our commitment is to provide our customers with products suitable for a wide range of applications.

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100th Anniversary

Company in Brief

Trade name
TVE Co., Ltd.
Date founded
March 1922
Date established
March 16, 2000
5-12-1 Nishitachibana-cho, Amagasaki-shi, Hyogo 660-0054, Japan
Phone: +81-6-6416-1184
Fax: +81-6-6416-1305
1,739,559,810 yen
CEO & Representative Director
Koumei Sasano
Number of employees
Consolidated 418 (at March 31, 2022)
Non-consolidated 304
Scope of business
Manufacturing and sale of various valves; maintenance, manufacturing and sale of various cast products
Japan Valve Manufacturers’ Association
Japan Petroleum Institute
Japan Society of Mechanical Engineers
The Association for the Promotion of International Trade Japan
Nuclear Safety Research Association
The Institution for Safety of High Pressure Gas Engineering
Japan Welding Society
Thermal and Nuclear Power Engineering Society of Japan
Foundation of Osaka Sci. & Technology Center
Research Institute of Innovative Technology for the Earth
Steel Castings and Forgings Association of Japan
Authorizations and endorsements
China National Nuclear Safety Administration, HAF604 Certification
China Safety Valve Manufacturing Permit
Factories certified by High-pressure Gas Safety Regulations
Shipping association endorsements: NK, LR, ABS, DNV/GL, BV, JG, KR, CCS China Class, CR China Classification Society, and others
Certification of registration for Quality Assurance Systems from power companies and plant manufacturers
ISO 9001 Certification
Specified construction permits (pipe construction, machinery and equipment installation work, civil engineering, scaffolding and earthwork construction)
General Construction License (electrical work)
Licensed as a General Temporary Worker Agency

Directors and Executive Officers

Directors (excluding members of the Audit and Supervisory Committee)

  • Representative Director

    Koumei Sasano

  • Director

    Kiyotaka Arimatsu

  • Director

    Akihiko Iida

  • Director

    Masaaki Kakutani

  • Director

    Toshiyuki Miyake

  • Director

    Kazunori Okui

Directors who are also members of the Audit and Supervisory Committee

  • Director and full-time member of the Audit and Supervisory Committee

    Shigemitsu Hirano

  • Director (external) and member of the Audit and Supervisory Committee

    Mitsuhiro Hamamoto

  • Director (external) and member of the Audit and Supervisory Committee

    Yukako Ikukawa

Executive Officers

  • President and CEO

    Koumei Sasano

  • Senior Managing Executive Officer

    Kiyotaka Arimatsu

  • Managing Executive Officer

    Akihiko Iida

  • Managing Executive Officer

    Masaaki Kakutani

  • Managing Executive Officer

    Toshiyuki Miyake

  • Managing Executive Officer

    Hiroyuki Tanaka

  • Executive Officer

    Hiroshi Kawakami

  • Executive Officer

    Takayuki Nagai

  • Executive Officer

    Hidetaka Masumura

Organizational Chart

Head Office Plant

5-12-1 Nishitachibana-cho, Amagasaki-shi, Hyogo 660-0054, Japan

Phone: +81-6-6416-1184 Fax: +81-6-6416-1305


Tokyo Branch

4th Fl., Nitta-cho Building
5-34-6 Shiba, Minato-ku, Tokyo 108-0014, Japan

Phone: +81-3-5445-4862 Fax: +81-3-5445-4867


Wakasa Office

13-4 Aza Nishichoda, 77 Miyazaki, Takahama-cho, Oi-gun, Fukui 919-2225, Japan

Phone: +81-770-71-0170 Fax: +81-770-71-0171


Iga Plant (Steel Casting Manufacturing Department)

1700-1 Kawanishi, Iga-shi, Mie 519-1425, Japan

Phone: +81-595-45-4105 Fax: +81-595-45-4109


The list of branch offices includes 12 locations throughout Japan.

Group Companies



Read More

12J Enterprise Road, Enterprise 10,Singapore 627689


Scope of business Sales and maintenance of various valves



Toa Service Co., Ltd.

5-12-1 Nishitachibana-cho, Amagasaki-shi, Hyogo 660-0054, Japan

Phone: +81-6-6416-5233

Scope of business Staffing and various services


Toa Create Co., Ltd.

4th Fl., Iwaki New Town Center Building
4-2-4 Chuodai Iino, Iwaki, Fukushima 970-8044, Japan

Phone: +81-246-84-5322

Scope of business Decontamination and decommissioning, temporary staffing, residential construction and sales, and other businesses


TVE Refining Metal Co., Ltd.

2-4 Aza Nishizato-ga-mae, 119 Hongo, Oi-cho, Oi-gun, Fukui 919-2111, Japan

Phone: +81-770-77-5097

Scope of business Demolition work associated with the decommissioning of nuclear power plants, metal recycling, and other businesses


Taiyo Dengyo Co., Ltd.

1-30-10 Kamata, Ota-ku, Tokyo 144-0052, Japan


Scope of business Radiation measuring equipment management and electrical / instrumentation business in nuclear facilities, etc.


Company Chronology


Business History
  • March 1922

    Ota Kogyo Shokai is established.

Technology and Product History
  • From March 1922

    The Company begins manufacturing and selling valves, cocks and steam traps.


Business History
  • November 1932

    The Company is renamed Mushi-jirushi Valve Works, Ltd.


Business History
  • April 1940

    Mushi-jirushi Valve Manufacturing Co., Ltd. is established.

  • May 1942

    The Company is renamed Toa Valve Co., Ltd.


Business History
  • October 1953

    The Company issues an initial public offering in Osaka.

Technology and Product History
  • January 1953

    The Company’s safety valves for steam cans are certified under the provisions of the Industrial Safety and Health Regulations of the Ministry of Labour.

  • March 1954

    The Ministry of Transportation grants the Company approval under the Japanese Industrial Standard (JIS) for labeling of marine cast forged steel globe and angle valves.


Business History
  • October 1961

    The Company is listed on the Second Section of the Osaka Securities Exchange.

Technology and Product History
  • 1962

    The first main steam stop valve manufactured in Japan is delivered to the Sendai Thermal Power Plant of the Tohoku Electric Power Company.


Business History
  • April 1971

    The Company is listed on the Second Section of the Tokyo Stock Exchange.

  • September 1974

    Toa Engineering Co., Ltd. is established.

Technology and Product History
  • 1969–1970

    The Company delivers valves to Japan’s first commercial nuclear power plants — Tsuruga Unit 1 (a BWR) and Mihama Unit 1 (a PWR) — providing power to Expo Osaka.

  • August 1973

    The Company delivers Japan’s first pressurizer safety valve to a PWR Nuclear Power Plant (Genkai Unit 1).


Business History
  • July 1989

    T.S.K. Co., Ltd. (now Toa Service Co., Ltd.) is established.

Technology and Product History
  • January 1987

    The Company delivers primary and secondary loops to China’s Qinshan Nuclear Power Plant Unit 1.

  • October 1988

    The Company begins development of a local valve seat replacement (cutting and welding) device and in December manufactures this product for installation in a power plant.

  • October 1989

    The Company provides the Takahama Power Station with Japan’s first automatic inspection device for a main steam safety valve blowing pressure.


Technology and Product History
  • September 1990

    The Company provides Kansai Electric with the first iteration of TACS, an automatic diagnosis device for electric valves.

  • October 1992

    The Company acquires ISO 9001 certification for valve manufacturing.


Business History
  • March 2000

    Toa Valve Group Head Office is established through a transfer of shares.

  • June 2000

    Takada Steel Co., Ltd. becomes a wholly owned subsidiary.

  • October 2002

    Toa Valve Overseas Pte. Ltd. is established in Singapore.

  • October 2006

    Takada Steel Co., Ltd. is absorbed into Toa Valve Co., Ltd. through a corporate split.

  • October 2008

    Toa Valve Co., Ltd. merges with Toa Valve Engineering Co., Ltd. to become Toa Valve Engineering Co., Ltd.

Technology and Product History
  • November 2000

    The Company acquires ISO 9001 certification for valve maintenance.

  • March 2002

    The Company delivers a 1175-mm low-temperature rethermal steam pipe stop valve (isolation device), Japan’s largest, to Unit 1 of the Misumi Power Station.

  • January 2007

    The Company delivers an exhaust gas pressure adjustment valve to JAXA (Japan Aerospace Exploration Agency) as part of the rebuilding of annular combustion test equipment.

  • May 2009

    The Company’s Steelmaking Division acquires ISO 9001 certification.


Business History
  • April 2010

    The Head Office of the Toa Valve Group merges with its subsidiary, Toa Valve Engineering Co., Ltd., and is renamed Toa Valve Engineering Inc.

  • July 2010

    The Company concludes a technical tie-up with the HE Harbin Power Plant Valve Company in China for the manufacture of extraction check valves and forged Globe valve.

  • April 2013

    The Company concludes a technical tie-up with HE Harbin Power Plant Valve Co., Ltd. in China for the manufacture of moisture separation heater escape valves.

  • July 2014

    Toa Create Co., Ltd. is established in Iwaki, Fukushima prefecture.

  • February 2016

    The Company concludes a capital and business alliance with KITZ Corporation.

  • December 2016

    The Company is reorganized from a company with a Board of Corporate Auditors to a company with an Audit and Supervisory Committee.

  • October 2019

    TVE Refine Metal Co., Ltd. is established in Ohi, Fukui Prefecture.

Technology and Product History
  • February 2011

    The Company begins manufacturing and selling liquid pressure nuts requiring no tightening with torque wrenches (for use only with nuclear power equipment).

  • October 2011

    The Company delivers a 600-mm moisture separation heater escape valve to the AP1000 Sanmen No. 1 Nuclear Power Plant in China.


Business History
  • August 2020

    TOA VALVE OVERSEAS Pte. Ltd., our Singapore subsidiary, is renamed TVE GLOBAL ASIA PACIFIC Pte. Ltd.

  • October 2020

    The company is renamed TVE Co., Ltd.

  • Jan 2022

    Taiyo Dengyo Co.,Ltd. becomes a subsidiary.

  • Mar 2022

    100th anniversary year

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