1970

Masahiro Kotani founded Kotani Tankosho as a private company in Kasai City

1974

Incorporated and changed the company name to Kotani Co., Ltd.

1979

Plant No.2 was built at Shimo-miyaki-cho, Kasai City

1982

Sales amount exceeded 1 billion yen and production reached 800 thousand pieces per month

1983

Introduced 1,000 ton 5-station warm forging press machine (E line).
Started fully-automated production of bearings for FF type automobiles

1986

Introduced cool rolling machine for bearings

1991

Changed the company name from Kotani Tanko, Ltd. to Kotani Corporation

1993

Introduced hot rolling machine and 1,600 ton 5-station hot rolling forging machine (I Line)

1999

A new production method for hypoid gears (patent obtained)

2000

Obtained ISO 9002 certification
Introduced 2,500 ton 5-station hot forging line (A Line) and orbital forging line

2002

Obtained QS9000 certification

2004

Introduced 1,600 ton (M line)
Obtained ISO 14001 certification

2005

Plant No.4 (machining) was built
Introduced 2,500 ton 4-station hot forging line (R line)
Obtained ISO TS16949 certification
Increased the capital to 326 million and 400 thousand yen

2006

Kasai Minami Plant was built at Kasai Minami Industrial Complex
Introduced 2,500 ton press machine (S-line)
Introduced 1,200 ton press machine (T-line)
Introduced 2,000 ton press machine (U-line)

2007

Introduced Hot Rolling machine (H/R-F line)
Kotani Poland started its operation.

2009

Joint Venture agreement signed with Hirschvogel Holding GmbH
(JV company’s name changed to Hirschvogel Kotani Poland Sp. z.o.o.)

2011

Poland business completely transferred to Hirschvogel Holding GmbH

2012

No.5 plant constructed
3500 ton (X-Line) installed

2013

Opening branch of Tokai sales office at Anjo-city (Aichi-pref)

2014

Kotani (Zhangjiagang) Co.Ltd established

2016

Kotani Mexico, S.A. de C.V. established

2017

No.6 plant constructed Integrated production hot rolling
No.7 plant constructed Equipment maintenance plant
IATF16949 : 2016 certification obtained.

2018

To expand a building of kasai-minami plant 1, it could achieve an integrated production(Process: shearing , forging and isothermal annealing)
No.8 plant built installed Turnning-Line

2021

Kotani（Zhangjiagang）extend No.2 plant

2022

No.9 plant built add to turnning line
Welfare facility newly built in headquarters

2024

Head office newly built