Okamoto was formed when Nippon Gum Industries and Riken Rubber merged with the core company of Okamoto Rubber Co., Ltd., and assumed its current form when Okamoto absorbed Zebra-Kenko Bicycles. Okamoto has grown since then by incorporating various companies and businesses into its group.
We intend to continue to grow constantly by combining the philosophies, culture, and manufacturing technologies of each company in the group.
Timeline of Corporate History
1934-1967:Establishment and Technology Development
1932
December
Minosuke Okamoto, his older sister, and his younger brother began conducting research on condoms made of natural rubber latex
1934
January
Nippon Gum Industries, Ltd. established in Togoshi-cho, Ebara-ku, Tokyo
February
Okamoto Rubber Plant established in Azuma-machi, Mukojima-ku, Tokyo
1935
August
Hirai Plant opened in Hirai, Edogawa-ku, Tokyo
1936
August
Okamoto Rubber Plant incorporated as Kokusai Gomu Kogyo Kabushiki Kaisha
1937
June
Riken Gomu Kogyo Kabushiki Kaisha established in Oji-ku, Tokyo
1943
July
Ashikaga Plant opened in Ashikaga-shi, Tochigi Prefecture
1945
March
Former Fukushima Plant opened in Takahagi- korojiri, Ogawa-machi, Iwaki-gun
1947
August
Kokusai Gomu Kogyo Kabushiki Kaisha changed its trade name to Okamoto Rubber Co., Ltd.
1949
July
Listed on the Tokyo Stock Exchange
October
Riken Gomu Kogyo Kabushiki Kaisha changed its trade name to Riken Rubber Co., Ltd.
1953
September
Zebra-Kenko Bicycles Co., Ltd. established in Ginza, Chuo-ku, Tokyo
1958
February
Riken Rubber Co., Ltd. and Nippon Gum Industries, Ltd. merged to become Nippon Riken Rubber Co., Ltd.
August
Osaka Sub-branch Office opened in Itoyamachi, Higashi-ku, Osaka
1961
June
Nippon Riken Rubber Co., Ltd. headquarters relocated to Harukicho, Bunkyo-ku, Tokyo
August
Kanagawa Plant opened in Higashihara, Zama-shi, Kanagawa
October
Assigned to the First Section of the Tokyo Stock Exchange
1963
October
Representative office opened in British Hong Kong
1964
April
Gunma Plant opened in Uekinocho, Ota-shi
May
Ibaraki Plant opened in Itabashimachi, Ryugasaki-shi
1965
June
Fukushima Plant opened in Akai, Taira-shi
1966
September
Completed construction of headquarters building
1968-1985: Technical Innovation and Establishment of Organization
1968
February
Nippon Riken Rubber Co., Ltd. and Okamoto Rubber Co., Ltd. merged to become Okamoto Riken Rubber Co., Ltd.
1970
January
Zebra Bicycles Co., Ltd. changed its trade name to Zebra-Kenko Bicycles Co., Ltd.
April
Listed in the First Section of the Osaka Securities Exchange
1974
January
Established subsidiary O.M. Inc. in USA
1976年
May
Okamoto Riken Rubber Co., Ltd. absorbed Zebra-Kenko Bicycles Co., Ltd.
1981
February
Established Okamoto Sewing Co., Ltd.
October
Fuyo Cycle Co., Ltd. acquired as a subsidiary, became Zebra Bicycles Co., Ltd.
1984
February
50th anniversary of establishment
1985
April
Opened Shizuoka Plant in Yoshida-cho, Haibara-gun
1985-present: Technology Fusion, International Expansion
1985
October
Okamoto Riken Rubber Co., Ltd. changed its trade name to Okamoto Industries, Inc.
1989
July
Teamed with Michelin to establish the joint venture Michelin Okamoto Tire Corporation
1998
April
Established subsidiary SIAM OKAMOTO Co., Ltd. in Thailand
1999
August
Established subsidiary APOLLOTEX Co., Ltd. in Thailand
2000
March
Dissolved business association with Michelin, transferred joint venture
April
Acquired Hillson-Dec Co., Ltd. as a subsidiary
2001
March
Acquired Union Royal Co., Ltd. as a subsidiary
2002
August
Acquired laminate film business
2004
April
Acquired dehumidifier (“Mizutori-zosan”) business
May
Established subsidiary OKAMOTO RUBBER PRODUCTS Co., Ltd. in Thailand
August
Established subsidiary OKAMOTO VIETNAM Co., Ltd. in Vietnam
September
Acquired Secaicho Co., Ltd. as a subsidiary
December
Acquired decorative films business
2005
March
Acquired Ichijiku Pharmaceutical Co., Ltd. as a subsidiary
June
Acquired laminate film (“allomer film”) business
2006
March
Acquired cockroach insecticide (“INPYRETH”) business
August
Opened Joso Distribution Center in Joso-shi, Ibaraki Prefecture
November
Established subsidiary Okamoto Industries (Shenzhen) Co., Ltd. in China
2007
April
Acquired dehydrant/absorbent sheet for food products (“Pichitto”) business via transfer
May
Established subsidiary VINA OKAMOTO Co., Ltd. in Vietnam
July
Established subsidiary OKAMOTO SANDUSKY Manufacturing L.L.C. in USA
2009
November
Opened Ushiku Distribution Center in Ushiku-shi, Ibaraki Prefecture
2010
October
Secaicho Co., Ltd. and Union Royal Co., Ltd. merged to become Secaicho Union Corporation
2012
January
Opened Okayama Distribution Center in Nagi-cho, Katsuta-gun, Okayama Prefecture
April
Acquired Funabori Rubber Co., Ltd. as a subsidiary
2013
February
Established subsidiary Okamoto Manufacturing（GD）Ltd. in China
June
Okamoto Sewing Co., Ltd. changed its trade name to Shoe Tech Okamoto Co., Ltd.
October
Commenced business of solar power generation for selling power
2014
February
80th anniversary of establishment
2017
September
Acquired Riken Corundum Co., Ltd. as a subsidiary
2019
February
85th anniversary of establishment