H-One Corporation

Our company's origins date back to 1930 when Genji Hirata started his sole proprietorship.

Genji Hirata started a sole proprietorship in 1930

In 1939 (Showa 14), Genji Hirata founded Hirata Industrial Co., Ltd. in Honjo Ward, Tokyo, for the purpose of producing metal press products.

Genji Hirata founded Hirata Industry Co., Ltd. in Bontyo Ward, Tokyo, for the purpose of producing metal press products

In November 1945, Hirata Industrial Co., Ltd. relocated its headquarters to Adachi Ward, Tokyo.

Hirata Industry Co., Ltd. relocated its headquarters to Adachi Ward, Tokyo

In 1946 (Showa 21), began manufacturing and selling Hirata Lamps.

Started manufacturing and sales of Hirata Lamps

In 1952 (Showa 27), Hirata Industrial Co., Ltd. started producing motorcycle and scooter parts for Honda Motor Co., Ltd.

Hirata Industry Co., Ltd. began production of motorcycle and scooter parts for Honda Motor Co., Ltd.

In July 1953, Hirata Industrial Co., Ltd. changed its trade name to Hirata Press Industry Co., Ltd.

Hirata Industry Co., Ltd. changed its trade name to Hirata Press Industry Co., Ltd.

Toshio Imai established Imai Manufacturing in 1959 under the trade name

In 1961 (Showa 36), Toshio Imai founded Hongo Manufacturing Co., Ltd. in Shimosasame, Toda Town, Kita Adachi District, Saitama Prefecture, for the manufacture and sale of press sheet metal products and machine parts.

Toshio Imai founded Hongo Manufacturing Co., Ltd. in Shimosasame, Toda Town, Kitaadachi District, Saitama Prefecture, for manufacturing and sales of press sheet metal products and machine parts

In November 1961, Hirata Press Industry Co., Ltd. established Maebashi Works in Maebashi City, Gunma Prefecture.

Hirata Press Industry Co., Ltd. established Maebashi Manufacturing Plant in Maebashi City, Gunma Prefecture

In September 1963, Hirata Press Industry Co., Ltd. established Kameyama Works in Kameyama City, Mie Prefecture.

Hirata Press Industry Co., Ltd. established Kameyama Manufacturing Plant in Kameyama City, Mie Prefecture

In June 1967, Hirata Press Industry Co., Ltd. and Hongo Manufacturing Co., Ltd. began mass production of automobile parts after receiving orders from Honda Motor Co., Ltd.

Hirata Press Industry Co., Ltd. and Hongo Manufacturing Co., Ltd. received orders for automobile parts from Honda Motor Co., Ltd. and began full-scale mass production

In April 1971, Hongo Manufacturing Co., Ltd. established Koriyama Plant in Koriyama City, Fukushima Prefecture.

Hongo Manufacturing Co., Ltd. established Koriyama Business Office in Koriyama, Fukushima Prefecture

In April 1975, a large press factory was newly established in Kameyama.

In May 1984, Hirata Press Industry Co., Ltd. and Hongo Manufacturing Co., Ltd. participated financially in KTH Parts Industries Inc., Ohio, USA (currently North America has 5 bases).

Hirata Press Industry Co., Ltd. and Hongo Manufacturing Co., Ltd. participated in capital for the establishment of KTH Parts Industries Inc. in Ohio, USA (currently a consolidated subsidiary), and have established a total of five bases in North America to date

Hirata Press Industry Co., Ltd. changed its trade name to Hirata Corporation

Hongo Manufacturing Co., Ltd. changed its trade name to Hongo Corporation

Hongo Corporation established Toriyama Business Office in Nasukarasuyama, Tochigi Prefecture

In September 1994, Hirata Corporation listed its shares on the over-the-counter market of the Japan Securities Dealers Association.

In September 1994, Hirata Corporation established Hirata Parts (Thailand) Company Limited (now a consolidated subsidiary, H-One Parts (Thailand) Company Limited) in Ayutthaya Province, Thailand.

Hirata Corporation was listed on the over-the-counter market by the Japan Securities Dealers Association.

Hirata Corporation established Hirata Parts (Thailand) Company Limited (now a consolidated subsidiary, H-One Parts (Thailand) Company Limited) in Ayutthaya Province, Kingdom of Thailand.

In July 1997, Hirata Corporation established the Technology Information Center (now the Business Headquarters Haga) in Haga District, Haga District, Tochigi Prefecture.

Hirata Corporation established a Technical Information Center (now the Business Headquarters Haga) in Haga District, Tochigi Prefecture.

In December 1997, Hongo Corporation established Hongou India Private Limited (later H-One India Private Limited) in New Delhi, India, through joint investment with local capital.

Hongo Corporation established Hongo India Private Limited (later H-One India Private Limited) in New Delhi, India, through joint investment with local capital.

In 2000 (Heisei 12), KLP Corporation was established.

Hirata Corporation listed its shares on the over-the-counter market with the Japan Securities Dealers Association.

Hirata Corporation established Ota Factory in Ota City, Gunma Prefecture.

Established G-Hapii Corporation in 2001 (Heisei 13)

Hirata Corporation and Hongo Corporation established Guangzhou Aiki Auto Parts Co., Ltd. (now a consolidated subsidiary) in Guangdong Province, China.

Hirata Corporation and Hongo Corporation canceled their over-the-counter registration with the Japan Securities Dealers Association and listed on the JASDAQ Securities Exchange.

Established Q-Hapii Corporation in 2005 (Heisei 17)

Established W-Hapii Corporation in 2005 (Heisei 17)

Hirata Corporation and Hongo Corporation established Qingyuan Aiki Auto Parts Co., Ltd. (now a consolidated subsidiary) in Guangdong Province, China.

Hirata Corporation and Hongo Corporation established Wuhan Aiki Auto Parts Co., Ltd. (now a consolidated subsidiary) in Hubei Province, China.

They reached a basic agreement to merge on April 1, 2006 (merger contract signed in November, shareholders' meeting approval in December).

In 2006 (Heisei 18), Hongo and Hirata merged and changed the trade name to H-1

Relocated the headquarters to Saitama City in 2006 (Heisei 18)

In April 2006, consolidated research and development, product design, and sales departments in Haga District, Tochigi Prefecture, and in May of the same year, consolidated the development technology department in Koriyama City, Fukushima Prefecture

Hirata Corporation and Hongo Corporation merged, changed the company name to H-One Corporation, and relocated the headquarters to Omiya Ward, Saitama City, Saitama Prefecture.

Research and development, product design, and sales departments were consolidated in Haga District, Tochigi Prefecture.

Consolidated the development technology department in Koriyama City, Fukushima Prefecture in May 2008

Development technology department was consolidated in Koriyama City, Fukushima Prefecture.

Consolidated the prototype department in Nasukarasuyama City, Tochigi Prefecture in May 2009

Prototype department was consolidated in Nasukarasuyama City, Tochigi Prefecture.

Established H-1 Parts Chirongri Company Limited in Chonburi Province, Thailand in September 2010

H-One Parts Chonburi Company Limited was established in Chonburi Province, Thailand.

Established Nakatsu Factory in Nakatsu City, Oita Prefecture in October 2010

Nakatsu Factory was established in Nakatsu City, Oita Prefecture.

Established G-TEC Co., Ltd. jointly funded with G-Tek Corporation in Guanajuato State, Mexico in March 2012

G-One Auto Parts de Mexico S.A. de C.V. was established in Guanajuato State, Mexico, through joint investment with G-Tech Co., Ltd.

Established PTH-1 Kogei Prima Auto Technologies Indonesia in Karawang Regency, West Java, Indonesia, jointly funded with Nijiki Co., Ltd. and Piti Roda Prima Lanka in October 2013

P.T. H-One Coating Prima Auto Technologies Indonesia was established in Karawang Regency, West Java, Indonesia, through joint investment with P.T. P.T. Roda Prima Rangka.

Established Koka Factory in Konan City, Shiga Prefecture in May 2015

Koka Factory was established in Koka City, Shiga Prefecture.

Closed Tota Factory (Toda City, Saitama Prefecture) in March 2016

Closure of Toda Factory (Toda City, Saitama Prefecture)

Decided to voluntarily apply International Financial Reporting Standards (IFRS) in April 2016, and changed the listing market to the Tokyo Stock Exchange Second Section in June

Decided to voluntarily apply International Financial Reporting Standards (IFRS)

Changed listing market to the Second Section of the Tokyo Stock Exchange

Listed on the First Section of the Tokyo Stock Exchange

Designated on the First Section of the Tokyo Stock Exchange in March 2017

Listed on the First Section of the Tokyo Stock Exchange

Established Dongfeng AiJi Automobile Press Parts Co., Ltd. in Hubei Province, China, jointly invested with Dongfeng Moulding and Chongqing Aiji Automobile Parts Co., Ltd.

Established Bungo Takada Factory in Bungo Takada City, Oita Prefecture in October 2021

Established Bungo Takada Factory in Bungo Takada City, Oita Prefecture

Established Zhaoqing Ai Ji Automobile Parts Co., Ltd. in Guangdong Province, China in January 2022

Established Zhaoqing Aiji Automobile Parts Co., Ltd. in Guangdong Province, China

When WN-Hapii was established

Listed on the Prime Market of the Tokyo Stock Exchange in April 2022

Listed on the Prime Market of the Tokyo Stock Exchange

Closed Nakatsu Factory (Nakatsu City, Oita Prefecture) in June 2022

Closure of Nakatsu Factory (Nakatsu City, Oita Prefecture)

Established Wuhan Aiqi New Energy Automobile Co., Ltd. in Hubei Province, China, in September 2022

Established Wuhan Aiji New Energy Vehicle Co., Ltd. in Hubei Province, China

Transferred the business of H-One India Private Limited, a consolidated subsidiary in India, to Bellrise Industries Limited in March 2025

Transferred the business of the Indian consolidated subsidiary H1 India Private Limited to Bellrise Industries Limited

Relocated the headquarters to the current address in Omiya Ward, Saitama City, Saitama Prefecture, in December 2025

Relocated headquarters to the current address in Omiya Ward, Saitama City, Saitama Prefecture

Liquidated Zhaoqing Aiji Automobile Parts Co., Ltd. (Guangdong Province, China)

Consolidated the prototype division (Nasukarasuyama, Tochigi Prefecture) and the development technology division (Koriyama, Fukushima Prefecture) to Maebashi, Gunma Prefecture, in March 2026

Relocated and consolidated prototype departments (Nasukarasuyama City, Tochigi Prefecture) and development technology departments (Koriyama City, Fukushima Prefecture) to Maebashi City, Gunma Prefecture