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
Minosuke Okamoto, his older sister, and his younger brother began conducting research on condoms made of natural rubber latex
Nippon Gum Industries, Ltd. established in Togoshi-cho, Ebara-ku, Tokyo
Okamoto Rubber Plant established in Azuma-machi, Mukojima-ku, Tokyo
Hirai Plant opened in Hirai, Edogawa-ku, Tokyo
Okamoto Rubber Plant incorporated as Kokusai Gomu Kogyo Kabushiki Kaisha
Riken Gomu Kogyo Kabushiki Kaisha established in Oji-ku, Tokyo
Ashikaga Plant opened in Ashikaga-shi, Tochigi Prefecture
Former Fukushima Plant opened in Takahagi- korojiri, Ogawa-machi, Iwaki-gun
Kokusai Gomu Kogyo Kabushiki Kaisha changed its trade name to Okamoto Rubber Co., Ltd.
Listed on the Tokyo Stock Exchange
Riken Gomu Kogyo Kabushiki Kaisha changed its trade name to Riken Rubber Co., Ltd.
Zebra-Kenko Bicycles Co., Ltd. established in Ginza, Chuo-ku, Tokyo
Riken Rubber Co., Ltd. and Nippon Gum Industries, Ltd. merged to become Nippon Riken Rubber Co., Ltd.
Osaka Sub-branch Office opened in Itoyamachi, Higashi-ku, Osaka
Nippon Riken Rubber Co., Ltd. headquarters relocated to Harukicho, Bunkyo-ku, Tokyo
Kanagawa Plant opened in Higashihara, Zama-shi, Kanagawa
Assigned to the First Section of the Tokyo Stock Exchange
Representative office opened in British Hong Kong
Gunma Plant opened in Uekinocho, Ota-shi
Ibaraki Plant opened in Itabashimachi, Ryugasaki-shi
Fukushima Plant opened in Akai, Taira-shi
Completed construction of headquarters building
1968-1985: Technical Innovation and Establishment of Organization
Nippon Riken Rubber Co., Ltd. and Okamoto Rubber Co., Ltd. merged to become Okamoto Riken Rubber Co., Ltd.
Zebra Bicycles Co., Ltd. changed its trade name to Zebra-Kenko Bicycles Co., Ltd.
Listed in the First Section of the Osaka Securities Exchange
Established subsidiary O.M. Inc. in USA
Okamoto Riken Rubber Co., Ltd. absorbed Zebra-Kenko Bicycles Co., Ltd.
Established Okamoto Sewing Co., Ltd.
Fuyo Cycle Co., Ltd. acquired as a subsidiary, became Zebra Bicycles Co., Ltd.
50th anniversary of establishment
Opened Shizuoka Plant in Yoshida-cho, Haibara-gun
1985-present: Technology Fusion, International Expansion
Okamoto Riken Rubber Co., Ltd. changed its trade name to Okamoto Industries, Inc.
Teamed with Michelin to establish the joint venture Michelin Okamoto Tire Corporation
Established subsidiary SIAM OKAMOTO Co., Ltd. in Thailand
Established subsidiary APOLLOTEX Co., Ltd. in Thailand
Dissolved business association with Michelin, transferred joint venture
Acquired Hillson-Dec Co., Ltd. as a subsidiary
Acquired Union Royal Co., Ltd. as a subsidiary
Acquired laminate film business
Acquired dehumidifier (“Mizutori-zosan”) business
Established subsidiary OKAMOTO RUBBER PRODUCTS Co., Ltd. in Thailand
Established subsidiary OKAMOTO VIETNAM Co., Ltd. in Vietnam
Acquired Secaicho Co., Ltd. as a subsidiary
Acquired decorative films business
Acquired Ichijiku Pharmaceutical Co., Ltd. as a subsidiary
Acquired laminate film (“allomer film”) business
Acquired cockroach insecticide (“INPYRETH”) business
Opened Joso Distribution Center in Joso-shi, Ibaraki Prefecture
Established subsidiary Okamoto Industries (Shenzhen) Co., Ltd. in China
Acquired dehydrant/absorbent sheet for food products (“Pichitto”) business via transfer
Established subsidiary VINA OKAMOTO Co., Ltd. in Vietnam
Established subsidiary OKAMOTO SANDUSKY Manufacturing L.L.C. in USA
Opened Ushiku Distribution Center in Ushiku-shi, Ibaraki Prefecture
Secaicho Co., Ltd. and Union Royal Co., Ltd. merged to become Secaicho Union Corporation
Opened Okayama Distribution Center in Nagi-cho, Katsuta-gun, Okayama Prefecture
Acquired Funabori Rubber Co., Ltd. as a subsidiary
Established subsidiary Okamoto Manufacturing（GD）Ltd. in China
Okamoto Sewing Co., Ltd. changed its trade name to Shoe Tech Okamoto Co., Ltd.
Commenced business of solar power generation for selling power
80th anniversary of establishment
Acquired Riken Corundum Co., Ltd. as a subsidiary
85th anniversary of establishment