About us

Greeting from the President

  • Omichi Seiyaku was established in 1905 in Osaka Prefecture and started production of various pharmaceutical products in Japan for many years.

    Since 1958, we have developed specialty phosphorous compounds with the technologies accumulated in the early years for the wide applications in synthetic fibers, polymers, electronics appliances, IT equipment and automobile industries to be used as catalyst, stabilizing agent, various improver, and reducing agents.

    To secure the resource of raw materials and intermediates to keep stable supply and competitiveness, we have been in contacts with overseas partners for many years.

    Being a manufacturer of specialty products, our entire team keeps on making further efforts to provide new developments and manufacturing of specialty compounds to meet the needs of our customers. For which our Fukui factory plays an important role.

    Shigeo Fuji

    Omichi Seiyaku Co., Ltd.
    Pax Co., Ltd.
    Union Co., Ltd.

    Speciality Phosphates (Malaysia) Sdn. Bhd. (JV with Nylex (Malaysia) Bhd.)

Company Outline

Company Name Omichi Seiyaku Co., Ltd.
President Shigeo Fuji
Established 1948
Location 5-14-72, Daido, Higashiyodogawa-ku, Osaka, 533-0011, Japan
Tel +81-6-6328-0333
Fax +81-6-6328-0283
E-Mail omichiseiyaku@omichi-s.co.jp
Factory Fukui Factory
Affiliated Company Union Co., Ltd.
Pax Co., Ltd.
Speciality Phosphates (Malaysia) Sdn. Bhd.


1905 Foundation of the factory in Osaka Prefecture. Started production and sales of Hydrochloric acid, Sulfuric acid and Nitric acid that conforms to Japanese Pharmacopeia.
1930 Moved the factory to the current location in Osaka city. In addition to the pharmaceutical raw materials, started the first production of Calcium hypophosphite in Japan.
1958 Started production and sales of secondary phosphorous products such as Sodium hypophosphite, Phosphorous acid and Hypophosphorous acid To serve the needs if the customers in Synthetic resins, Metal surface treatment, Catalysts and pharmaceutical products.
1973 On request of Jiangsu Province, China, and former Shanghai Chemical Industry, started cooperation on Calcium hypophosphite providing production technology and obtained its sales right.
1981 Made Union Co., Ltd a wholly owned subsidiary.
1988 Established Speciality Phosphates Malaysia as a joint venture to produce specialty phosphates. with Albright & Wilson UK Ltd (transferred to Nylex Specialty Phosphates Malaysia as of today) Production technology and sales rights belong to Omichi entirely.
1990 Made Pax Co., Ltd a wholly owned subsidiary.
1991 Established Fukui Factory in Technoport Fukui, a new factory to enhance production capacity.
2005 100th anniversary of the company.
2008 Obtained ISO 9001 certificate.
2013 Construction of new warehouse at Fukui factory to ensure stable supply.
2015 Obtained ISO 14001 certificate.

ISO9001 / ISO14001

Business Locations

  • Omichi Seiyaku Co., Ltd. Head Office

    5-14-72, Daido, Higashiyodogawa-ku, Osaka, 533-0011, Japan
    Tel:+81-6-6328-0333 Fax:+81-6-6328-0283
    E-Mail omichiseiyaku@omichi-s.co.jp

  • Omichi Seiyaku Co., Ltd. Fukui Factory

    3-5-1, Technoport, Ishishinbo-cho, Fukui-shi, 910-3138, Japan
    Tel:+81-776-85-1177 Fax:+81-776-85-1209

  • Union Co., Ltd.

    6-3-1, Tanou, Amagasaki, Hyogo, 661-0951, Japan
    TEL : +81-6-6491-0818 FAX : +81-6-6491-7005

  • Pax Co., Ltd.

    77-1, Shingou, Higashimatsuyama, Saitama, 355-0071, Japan
    TEL : +81-493-24-4778 FAX : +81-493-24-4799

  • Speciality Phosphates (Malaysia) Sdn. Bhd.

    Lot593&624, Persiaran Raja Lumu, Kawasan Perusahaan Pandamaran, 42000 Port Klang, Selangor, Malaysia.

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