Watahan Trading Co., Ltd. sells and imports / exports pharmaceuticals, cosmetics, food ingredients, etc.

Corporate information


Head Office MAP

Watahan Nohara Building 7F 4, 1chome, Yotsuya, Shinjuku-ku, Tokyo 160-0004, Japan

Quality Assurance Department

Providing Security and Reliability centered on appropriate Quality Control, Quality Assurance and Regulatory Affairs System

Through close communication with Foreign API manufacturers, we are working to continue importing reliable quality APIs.
Quality Control Department is engaged in the following tasks every day.

Quality Control

  • Management of tests conducted at our Pharmaceutical Laboratory and other Testing and Inspection Facilities

Quality Assurance

  • Coping with the Inspections from authorities and customers
  • Quality agreement conclusion with customers and overseas business partners

Regulatory Affairs

  • Management of various business licenses of our domestic manufacturing facilities
  • Acting as an agent for Foreign Manufacturer Accreditation (FMA)
  • Acting as an in-country-caretaker for Drug Master Files (DMF)

Head Office
Head Office


Business Development Department

Introduce overseas unique materials to Japan

Search and import of natural and organic materials

  • We search and provide abroad cosmetic ingredients to Japan Market .

Development of formulations

  • In cooperate with Chemical Department, create prototypes that utilize our ingredient characteristics. Not only we suggest our products to the customers, but also we develop our original prototypes thinking from customers' perspective. We consider it so that our customers can image the characteristics of our materials more clearly when developing final products.

Formulations that we can propose

  • The one from overseas supplier
    IOI Oleo (Germany) and Prod'hyg (France)
  • Our original
    We propose original prototypes that are more preferred by Japanese people according to the local needs.

Categories available

  • Skin care, hair care, etc.
    We also provide that made of all organic certified materials.

Pharmaceutical D/P

We did not depend only on import of medical-supplies original medicine, but have realized stable supply of medical supplies by cooperation of a production section.

Chemical D/P

We specialize in research and development of natural plants, mainly originated in Mexico, etc. to be used for cosmetic and health food industries in Japan, protecting natural environment with local residents.

Pharmaceutical Laboratory

From now on, we advance useful development and useful research of a new drugs.
4601 Ikebe-Cho, Tsuzuki-Ku, Yokohama,Kanagawa 224-0053, Japan

Watahan de Mexico

We export plant raw materials from Mexico.