About Us


   Siam Steri Services Co., LTD.  was established in 2005 as 100% subsidiary company of Tomoe Shokai for the provision of  the synthetic services of Gamma radiation and Ethylene Oxide gas Sterilization for the medical equipment to our customers. 

Tomoe Shokai Co., Ltd.

(Japanese Company)

Gas-offering promise for the future Tomoe Shokai has led the industry for fifty-seven years as a specialized industrial gas trading house. In spite of many fluctuations in the economy, the company's history is one of steady development and unceasing evolution of advanced technologies, with each and every technological innovation adding a new and brilliant page.


Company History of Sterilization

1950  Tomoe Shokai Co., Ltd. is established in Japan. Begins sales of specialized gases. 

1973  Tomoe Shokai has started sterilization

 business at Omori plant in Japan.

1989  Japan Gas Co., Ltd. Haneda sterilization plant started.

1990  Steri Services Thailand Co., Ltd. is established.

2001  Sterile Services Singapore is established.

2005  Siam Steri Services is established in Thailand.

And now, Tomoe Shokai has four in Japan and four in overseas sterilization plants.   




Japan Gas Co.,Ltd. 

   Haneda Plant

   Omori Plant

   Shizuoka Plant

   Takasaki Plant

Overseas             Thailand





Steri Services Thailand   


Siam Steri Services (Chonburi)


Sterile Services Singapore

   Jalan Buroh Factory

   Marsiling Factory

Siam Steri Services Co., Ltd. Profile

SIS Establishment  November 2005

ISO Qualification Certified ISO 9001(2000), ISO 13488, EN 550, ISO 11135 Oct. 2006.

EN552 certified May 2007.

Bank  Tokyo Mitsubishi Bank Thai Branch

Head Office/Factory  700/644 Amata Nakorn Industrial Estate, Moo 3 Tambol Bankao, Amphur Pantong, Chonburi 20160, Thailand

Capitalization 300 million Baht

Shareholder Tomoe-Shokai Co., Ltd 100%


Link to Tomoe Shokai & Subsidiary Company

   Tomoe Shokai Co.,Ltd.

   Japan Gas Co.,Ltd.

   Steri Services Thailand Co.,Ltd.

   Sterile Services Singapore  Pte.,Ltd.