Musashi Seimitsu Industry Co., Ltd.

Company Profile



39-5 Daizen, Ueta-cho, Toyohashi-shi, Aichi, 441-8560, Japan

Business Overview

-Parts manufacture under the Honda Group. The percentage of sales to Honda was 47% in the fiscal year that ended in March 2023.

-The Company manufactures and sells automotive parts for powertrains, suspensions, steering systems, and transmissions, in addition to manufacturing and selling products for motorcycles and ATVs.

-From around 2018, the Company started investing in and forming alliances with start-ups and venture-capital companies. Examples include REE, an EV platform developer based in Israel; Aquarius Engines that develops compact electric generating engines (engine generators); SAKUU, a company based in the USA and which develops all-solid batteries that use 3D printing technology.

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2023 Business Overview of Japanese Suppliers

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-From April 2022 moved to the Prime Market of the Tokyo Stock Exchange, and to the Premium Market of the Nagoya Stock Exchange. (As of Mar. 31, 2023)
Name Investment Ratio (%)
Honda Motor Co., Ltd. 25.06
Master Trust Bank of Japan, Ltd. (Trust Account) 15.83
Custody Bank of Japan (Trust Account) 6.37
Otsuka Holdings Co., Ltd. 3.98
The Bank of New York Mellon 140044 2.57
Individual shareholder 2.30
JPMorgan Chase Bank, N.A., 385632 2.18
J. P. Morgan Bank Luxembourg S.A. 381572 1.95
Northern Trust Company (AVFC) Re Mondrian International Small Cap Equity Fund L.P. 1.69
Juniper 1.68
Total 63.66


Differential assembly for differential mechanism
-Differential assemblies
-Differential gears

Planetary assembly for decelerating mechanism
-Planetary Assembly
-Planetary assemblies for automatic transmissions
-Planetary assemblies for CVT
-Planetary assemblies for AWD vehicles
-Carrier cases and ring gears
-Clutch hub assemblies with sun gear

Transmission gears/Camshafts
-Balance shafts; engine vibration absorption functional components
-Transmission gears for AT
-Transmission gears for MT
-Transmission gears for DCT

Ball joint assembly for suspension and steering component
-Suspension arm assemblies
-Suspension ball joints
-Steering ball joints; tie-Rod end
-Steering Ball Joints; rack end


Apr. 1938 Established Ohtsuka Seisakusho at Togoshi, Shinagawa-ku, Tokyo.
Jan. 1944 Incorporated Ohtsuka Seisakusho as a joint-stock corporation and established Ohtsuka Koku Kogyo Co., Ltd.
Oct. 1946 Ohtsuka Koku Kogyo relocated to Toyohashi City, Aichi Pref. Changed name to Musashi Sangyo Co., Ltd.
Apr. 1947 Shifted to production of sewing machine parts. Began to manufacture and sell balance and sender cams.
Sep. 1956 Musashi Sangyo Co., Ltd. started producing motorcycle parts including camshafts and gears. Started transaction with Honda Motor Co., Ltd.
July, 1962 Started transaction with Kubota Tekko Co., Ltd (present Kubota Co., Ltd.)
Sep. 1963 Musashi Sangyo Co., Ltd. renamed as Musashi Seimitsu Industry Co., Ltd.
Jan. 1996 Acquired 100% of the shares issued by Kyushu Musashi Seimitsu Industry.
Honda took over the Company's capital increase for a consideration allocated to a third party and acquired 28.9% of the issued shares.
Mar. 1996 Established PT Musashi Auto Parts Indonesia (83.3% investment) in Indonesia with PT Federal Motors.
Apr. 1996 Obtained ISO9001 certification.
June, 1997 Established Musashi Auto Parts Canada Inc. (100% investment) in Ontario, Canada.
Mar. 1998 Invested in MotogearnorteIndatri de Engrenajemz Litd (currently Musashi de Brazil Limitada) (35.3% investment).
Aug. 1998 Obtained ISO14001 certification.
Dec. 1998 Listed on the over-the-counter market of the Japan Securities Association.
Dec. 1998 Made into subsidiary: MotogearnorteIndatri de Engrenajemz Litd (51.0% investment).
May, 1999 Obtained QS9000 certification.
Oct. 2000 Established Musashi South Carolina Inc. in South Carolina, USA.
Feb. 2000 Established Musashi Hungary Manufacturing, Ltd. in Hungary.
Jan. 2001 Established Musashi Europe GmbH in Wintershreizssheim, Germany.
Jan. 2001 Established Musashi North America Inc. in Michigan, USA.
Mar. 2002 Established Musasi da Amazonia Ltda. in Amazonia, Brazil.
Jul. 2002 Established Musashi Autoparts India Pvt., Ltd. in Haryana, India.
Jan. 2003 Established Musashi Auto Parts (Zhongshan) Co., Ltd. in Guangdong, China.
Dec. 2003 Established Musashi Asia Co., Ltd. (100% investment) in Bangkok, Thailand.
Mar. 2004 Listed on the Second Section of the Tokyo Stock Exchange and the Second Section of the Nagoya Stock Exchange.
Mar. 2005 Listed on the First Section of the Tokyo Stock Exchange and the First Section of the Nagoya Stock Exchange.
Dec. 2005 Established the 2nd. Akemi Plant in Akemi-cho, Toyohashi City, Aichi Prefecture.
Mar. 2009 Closed the Company's Noto Plant located on the site of Noto Industrial Park in Sika-machi, Hakui-gun, Ishikawa prefecture, Japan.
Nov. 2010 Established Musashi Auto Parts Vietnam Co.,Ltd., a wholly owned subsidiary in Hung Yen Province, Vietnam.
Dec. 2010 Liquidated Musashi South Carolina Inc., its wholly owned subsidiary in South Carolina, U.S.A.
Dec. 2011 Established Musashi India Pvt. Ltd. (a wholly owned subsidiary) in Haryana State, India.
Mar. 2012 Established Musashi Auto Parts Mexico, S.A. de C.V. (a wholly owned subsidiary) in San Luis Potosi, Mexico.
Jun. 2014 Established Musashi Auto Parts (Nantong) Co., Ltd. (tentative name) in Jiangsu, China.
Oct. 2014 Established Musashi Investment (Zhongshan) Co., Ltd. (tentative name) in Guangdong, China.
Jun. 2016 Acquired Hay Holding GmbH
Nov. 2017 Built a new production plant for the machinery business; in Akemicho, Toyohashi, Aichi Prefecture.
Aug. 2018 Merged Hay Holding GmbH with Musashi Europe GmbH, changing the company's name to Musashi Europe GmbH.
Oct. 2018 Turned Asada Katan Chutetsusho into a subsidiary.
Oct. 2019 Asada Katan Co., Ltd. adopted new name, Musashi Casting Co., Ltd.
Apr. 2020 Turned JM Energy into a subsidiary
Nov. 2020 Changed name of JM Energy Co., Ltd. to Musashi Energy Solutions Co., Ltd.
Apr. 2022 Moved to the Prime Market of the Tokyo Stock Exchange in line with the TSE’s reorganization.
Mar. 2023 Constructed the 2nd production plant at Musashi Auto Parts (Zhongshan) Co., Ltd. in Guangdong Province, China.

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