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Corporate Information

Food safety creates a happy future with a rich and varied diet


DOX is adopted by many customers because it enables them to detect food-related “just in case” situations as quickly as possible and take countermeasures.

Corporate Profile

Trade Name Bio-Theta, Ltd.
Name in English Bio-Theta, Ltd.
Established October 2020
President and Representative Director Masakazu Tsuji
Head Office Iizuka Research Park, 172-18 Kobukuro, Iizuka, Fukuoka 820-0066, Japan
TEL: 092-692-2603
FAX: 092-662-7715
Number of Employees 10
Main Products Food Bacteria Count System DOX-60F/DOX-30F
Cell cartridges with electrodes and liquid culture media exclusively for DOX
Financing Bank The Nishi-Nippon City Bank, Ltd.


  • 2003: DOX system launched by Bio-Theta, Ltd., a venture initiated by Daikin Environmental Laboratory of Daikin Industries, Ltd.
  • 2014: AOAC International PTM certification acquired.
  • 2015: DOX is featured in “Standard Methods of Analysis in Food Safety Regulation”.
  • 2020: Newly established in Iizuka (Fukuoka Prefecture), home of CROSSEED Co., Ltd., as a result of business succession.