About us

SINCE 1599   Our magnesium sulfate market share NO.1 in Japan
UMAI CHEMICAL CO., Ltd is a Japanese inorganic chemicals supplier whose main product is magnesium sulfate.
The history of our company dates back to 1599 when our ancestor Shichirobe Umai , salt manufacturing engineer, opened a salt pan at Muya area, present head office site, and started salt manufacturing. Thus, the history of our company began with salt, which we are not producing any more. The market share of our magnesium sulfate is No.1 in Japan.

During the past business period of over 410 years, we have improved the salt manufacturing technology and built up new technology to grow as an inorganic chemical manufacturer as well as supplier specializing in inorganic chemicals.

Our main product is magnesium sulfate. We are the biggest supplier in Japan with the largest market share of about 60%. We think our quality is N0.1 in Asia. We have five basic grades of crystalline magnesium sulfate of 99.999% purity with water content, anhydrous, 1.5 -hydrate, 2.5-hydrate, 3-hydrate and 7-hydrate . Liquid type is also available.

We have 40 items of magnesium sulfate for medicines , food additives, feed additives, reagents, cosmetics, fertilizers and industrial raw materials. Our pharmaceutical grade magnesium sulfate is approved by Japan GMP.

We also produce sodium nitrate, nickel nitrate, magnesium chloride, Silky Dip®(cow medicine to protect from mastitis) and AdBlue® (nox reduction agent for diesel engine). Our factory is certified with ISO9001 and ISO 14001.

We wish to be of any service to you and please contact to the following for our further sevices.
Company name
Start to business
Details of business
chemistry manufacturing and selling

Head office and Factory:
60Aza Matushima Kurosaki Muya-cho Naruto-city Tokushima 772-0001Japan
phone: 81- 088-685-4175(Japanese only)
Fax: 81-088-685-3054
E-mail : umaichem@umaichem.co.jp

Osaka branch:
4-3-9 Minamikyuhojicho Chuo-ku Osaka 541-0058 Japan
phone: 81-6-6251-5214
Fax: 81-6-6251-5365
E-mail : osaka@umaichem.co.jp

Tokyo branch:
3-10-21, Kotobuki-BLD 1F Kitaaoyamai Minato-ku Tokyo 107-0061 Japan
phone: 81-3-6433-5154
Fax: 81-3-3400-6900
E-mail : tokyo@umaichem.co.jp