- 2014
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Acquisition of Noble Skill Limited (Hong Kong).
Acquisition of Otsuka South China Precision Instruments (Shenzhen) Co., Ltd.
Otsuka Turftech Co., Ltd. became a subsidiary of Otsuka Chemical Co., Ltd.
Otsuka Chemical America Inc. established.
TERPLUS production facility completed at Tokushima Factory.
Acquisition of Higashiyama Film Co., Ltd., Higashiyama (Shanghai) Function Film Co., Ltd., and Higashiyama Film Korea Co., Ltd.
- 2010
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AgriTechno Business became independent and established a new company (company name: Otsuka AgriTechno Co., Ltd.) by way of management buyout (MBO).
- 2009
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Merger of subsidiary Otsuka Chemical Co., Ltd., Changed the company name to“Otsuka Chemical Co., Ltd. Became 100% subsidiary of Otsuka Holdings Co.,Ltd.
- 2008
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Acquisition of Ito life Science Co.,Ltd (present ILS Inc.), ILS (Shanghai) Inc. (China) and American Peptide Company Inc. (USA).
- 2007
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Otsuka Chemical do Brazil was established.
[Danisaraba] sales.
- 2006
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Otsuka Chemical India Ltd. (India), Chongoling Otsuka Huayi Chemical Co., Ltd. (China) were established.
Capital participation of Trocellen Iberica S.A. (Spain).
- 2005
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Acquisition of Trocellen GmbH (Germany) with Furukawa Electric Co.,Ltd.
- 2004
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Otsuka-MGC Chemical Company, Inc. was established as joint venture with Mitsubishi Gas Chemical Co.,Ltd.
Drip Fertigation Research Co. was established.
Zhanjiagang Otsuka Chemical Co., Ltd. (China) was established.
- 2003
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"Hachihachi" "Oncol Tablet" "Soukanbo" sales.
AgriBest Co., Ltd. was established.
- 2002
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Company name was changed to Otsuka Chemical Holdings.
Otsuka Chemical took over the chemicals and agricultural Chemicals business and as a result, Otsuka Chemical Co., Ltd. was established.
Otsuka Food Co., Ltd.was established.
Otsuka Furniture MS Co.,Ltd. established.
- 2000
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Matsushige Factory opening.
Friction material [Terracess] sales.
- 1999
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Rust-preventive agent [Shadan MG] sales.
- 1998
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[Uniform AZ Ultra] foaming agent sales.
[MISAKI], [the hydroponic culture system]
- 1997
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Coloring agent for the lawn [Green Way],
Dielectric property material [Terawave] sales.
- 1996
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Insecticide [Ondaia] sales.
Aldehyde absorbent [Chemcatch] sales.
- 1995
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Insecticide [Sted granule] sales.
- 1993
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Insecticide [Orion] sales.
- 1992
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Insecticide [Orate] sales.
- 1991
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The β-lactamase inhibitor [YTR] manufacturingfacility completed.
- 1990
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Cephalosporin antibiotic intermediate [GCLE] sales.
- 1989
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Japan Whisker Co., Ltd., P.T. Lautan Otsuka Chemical (Indonesia) was established, acquisition of Hebron S.A.
- 1988
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Otsuka Chemical Korea (present KOC Co., Ltd) was established.
- 1984
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It combined with Otsuka Furniture, capital was made ¥2,800,000,000.
Furnituredivision was established.
- 1980
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The insecticide [Unitect] sales.
- 1979
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Disinfect agent for agriculture materials [Ichiban], the insecticide [Rubitox], slug prevention agent [Namekit] sales.
- 1978
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The potassium titanate whisker [TISMO] sales.
- 1977
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Food Additive [Maltol] sales.
- 1976
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The herbicide [Palazet] sales.
- 1969
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Capital was made ¥2,400,000,000.
- 1968
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"Bon Curry" production and sales started. * at the present time Otsuka Foods sells Bon Curry
- 1965
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"Oronamin-C" sales started. * at the present time Otsuka Pharmaceutical sells Oronamin-C
- 1964
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The foliar spray fertilizer [sampi] sales.
- 1963
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The fertilizer sales.
- 1956
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[Uniform AZ] foaming agent sales.
- 1953
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Armpit bud repression medicine sales.
- 1950
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Organic chemistry section was separated from Otsuka Pharmaceutical Factory Inc., and chemicals were established.
Tokushima Factory (present Naruto factory) was established.
Potassium nitrate and Hydrazine sales started.