1951

• Yoshio Arai founded Arai Seisakusho LTD in Taito-ku, Tokyo Japan.

1955

• Started producing leather packing and leather button for industrial use.
• Discovered the "suction effect" of the seal and began development of high performance rubber seals made with synthetic rubber.

1956

• The establishment of ARS rubber seal. Yoshio Arai President of his founded company Arai Seisakusho.
• Arai registered "Ars" as the corporate mark and "Rubber seal" as the product name.

1957

• Yamaha adopted the rubber seal for all their motorcycles.

1959

• Head office moved to Katsushika-ku, Tokyo Japan.
• Honda adopted the Rubber seal for Super Cab engine.

1960

• ARS now supplier for Honda and Yamaha.
• Honda motorcycles dominated the Isle of Man TT race.

1963

• ARS received JIS factory certification for o-rings.

1965

• Honda and Yamaha adopted the use of "ARFLON" products.
• ARS received JIS factory certification for oil seals.

1966

• Founded Tsukuba factory.

1967

• Toyota adopted ARS valve stem seal for their entire Crown model.

1968

• Garlock(US) made an equity participant. Importing of rollers for copying machines begins.

1970

• Supplying special seals to Matsushita Denki for use in washing machines.

1972

• Success in developing fixed rollers for copying machines.
• Seeing the world market and stepping up with a global strategy.

1978

• Announcement of the ARFLON based new product the "FS Seal" and ARS applied for international patent.
• ARS begins producing reed valves for motorcycle engines.

1985

• Founded the Tsukuba West factory for production of OA products.
• Iwate Arai Co., Ltd., founded in Iwaizumi, Iwate.

1986

• The development of Fluororubber and the "KZ Seal".
• ARS applied for international and domestic patents.
• Technology licensing to Hi-Tech Ancillaries(India)

1987

• First overseas plant Arai Americas, Inc., founded in Virginia, US.

1989

• PT. Arai Rubber Seal Indonesia, founded in Tangerang, Indonesia.

1991

• Thai Arai Co., Ltd., founded in Siracha, Thailand.

1992

• Niigata Arai Co., Ltd., founded in Tokamachi, Niigata, Japan.

1994

• Equity participation in Hi-Tech Ancillaries. Name changed to Hi-Tech Arai Pvt. Ltd.

1995

• Wuhan Arai Oil Seal Mfg Co., Ltd., founded Wuhan, China.

1998

• ARS received ISO9001.

2001

• Dong-Guan Arai Rubber Products Ltd., founded in Dong-Guan, China.

2002

• ARS received ISO14001.

2005

• Vietnam Arai Co., Ltd., founded in Haiphong, Vietnam.

2009

• Head office moved to Tsukuba, Ibaraki, Japan.

2014

• Head office moved to Chuo-ku, Tokyo, Japan.

2015

• ARS received ISO/TS16949.

2018

• ARS received ISO/IATF16949.

2019

• PT. ARAI INDONESIA MANUFACTURING, founded in Karawang, Indonesia.