Company Profile / History
Company Profile
Basic Information
| Company Name | Yoshiwa Kogyo Co., Ltd. |
|---|---|
| Established | April 8, 1937 |
| Capital | 90 million yen |
| Business Description | Manufacturer of automotive components |
| Facilities | Head Office / Kaita Plant Muikaichi Plant Hatsumi Plant |
| Number of Employees | 426 (as of April 1, 2024) |
Sales Performance
| Fiscal Year | 57th | 58th | 59th | 60th | 61st |
|---|---|---|---|---|---|
| Net Sales | 13,668 | 10,372 | 11,891 | 14,734 | 15,089 |
Executive Team
| President and Representative Director | Masahiro Yoshino |
|---|---|
| Executive Vice President and Representative Director | Makoto Otsuka |
| Managing Director | Shunji Mikamoto |
| Managing Director | Takayuki Nakamura |
| Managing Director | Shigeaki Tanigaki |
| Director and Department Head | Kaori Yoshino |
| Auditor | Junji Yamamoto |
Major Customers
Mazda Motor Corporation, AS Brake Systems, Inc. Kawada Corporation
Kubota Iron Works Co., Ltd., Hiroshima Seimitsu Kogyo Co., Ltd.,
Advics Co., Ltd., ADVICS Co., Ltd. Hirose Plant,
Sapura, and others
*2023年10月～2024年3月実績(上位8位)
Main Products
Disc plates, differential cases, brackets, calipers & torque members, pairing inserts, knuckles, flywheels, and others
*2023年10月～2024年3月実績(上位7位)
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April 1937
Hiroshima Imono Kogyo Co., Ltd. was founded in Fuchu Town, Aki-gun, Hiroshima Prefecture. Began production of cast iron pipes and machine tool components.
May 1953
Second plant established in Shigeage, Fuchu Town. Mass production of small parts began, including agricultural equipment, automobile parts, vehicle components, and waterworks fittings.
December 1957
First plant relocated to Myojin-cho, Kaita Town, Aki-gun. Later, the second plant was also relocated and integrated.
October 1963
Merged with Wada Seisakusho Co., Ltd. and became Yoshiwa Kogyo Co., Ltd.
Aiming to integrate casting, machining, and assembly processes.
April 1973
Muikaichi Plant constructed in Yoshika Town, Kanoashi District, Shimane Prefecture.
Installed DISA-2013 automatic molding line.
April 1977
Started flywheel assembly operations, directly supplying Mazda's engine assembly plant.
June 1980
Installed AMF-07 high-speed, high-pressure flaskless molding line at Muikaichi Plant.
October 1981
Received capital investment from Mazda Motor Corporation.
June 1985
Hatsumi Plant built in Tanohara, Yoshika Town.
Installed APS-H5 automatic molding line.
July 1986
Phase 2 expansion of Hatsumi Plant.
Installed DISA-MK3 automatic molding line.
June 1989
Entered into a capital and technical partnership with Ajoo Metal Co., Ltd. in South Korea.
October 1989
Phase 3 expansion of Hatsumi Plant.
Installed GF-AIM automatic molding line.
September 1991
Installed FBM-3L Type A automatic molding line at Muikaichi Plant.
August 1992
Upgraded AMF-07 flaskless molding line at Muikaichi to FBM-3L Type B line.
May 1998
Replaced DISA-2013 molding line with DISA-MK5 model at Muikaichi Plant.
May 1999
Certified as an Excellent Quality Assurance Supplier by Mazda Motor Corporation.
June 2000
Acquired ISO 9002 / QS-9000 quality certifications.
April 2002
Acquired ISO 14001 environmental certification.
October 2004
Acquired ISO/TS 16949 automotive quality certification.
November 2004
Muikaichi Plant received TPM Excellence Award, Category 2 (FY2004).
August 2006
Installed two 5-ton medium-frequency induction furnaces at Muikaichi.
Upgraded GF-AIM molding line at Hatsumi Plant to ACE-5 model.
August 2007
Upgraded APS-H5 molding line at Hatsumi Plant to ACE-5 model.
August 2013
Held 75th anniversary ceremony.
August 2014
Upgraded Muikaichi Plant's cupola from Sakakawa model to Naniwa-Roki hot blast cupola.
October 2016
Replaced FBM-3L molding line at Muikaichi with the KDH molding line.
April 2017
Celebrated the 80th anniversary of the company's founding.
December 2017
Expanded the large-diameter disc plate machining line at Kaita Plant.
September 2018
Acquired IATF 16949 certification (automotive sector quality standard).
October 2019
Completed Phase 1 construction of new Kaita Plant.
June 2020
Completed Phase 2 construction of new Kaita Plant.