| October 1947 |
The Company is established in Marugame, Kagawa Prefecture,
with a capital of ¥2 million, as a producer of carbon disulfide. |
| October 1957 |
No. 1 Tokushima Plant (now Tokushima Plant's Yoshinari location) is built and begins operations in the production of sodium sulfate. |
| May 1961 |
CMC production begins at No. 1 Tokushima Plant.
We applied CMC to wall material later. |
| June 1962 |
No. 2 Tokushima Plant (now Tokushima Plant's Kitajima location) is built. |
| October 1962 |
The Company's shares are listed on the Second Section of the Tokyo Stock Exchange. |
| October 1963 |
The Company's shares are listed on the Second Section of the Osaka Securities Exchange. |
| May 1964 |
Japan's first operations to produce chlorinated cyanuric acid are launched at No. 2 Tokushima Plant. |
| December 1969 |
The company began sales of a water-soluble anti-rust agent for printed circuit boards and other electronic component. |
| September 1970 |
The Company begins operations in the field of building materials, launching production of interior wall materials at No. 2 Tokushima Plant. |
| June 1972 |
The Company begins production and sale of accordion doors. |
| March 1975 |
The Company moves its share listings from the Second to First Sections of the Tokyo Stock Exchange and Osaka Securities Exchange. |
| July 1975 |
Tadotsu Plant is built in Tadotsu, Kagawa Prefecture. |
| November 1975 |
Full-scale production of imidazole begins at No. 2 Tokushima Plant. |
| October 1979 |
The Company launches production and sales of aluminum shutters. |
| June 1981 |
The Company opens a representative office in Los Angeles. |
| July 1984 |
Production of insoluble sulfurs begins at Marugame Plant. |
| April 1989 |
The Company begins test marketing of Hipolka, a wastewater treatment product using microbes and enzymes. |
| April 1990 |
The Company establishes its Tokyo Head Office (now Makuhari Branch Office) in Makuhari Techno Garden, Makuhari, Chiba Prefecture. |
| September 1992 |
A research center (now R&D Center) is constructed in Utazu, Kagawa Prefecture. |
| August 1995 |
No. 2 Tokushima Plant is certified under ISO 9002. |
| October 1995 |
Ranzan Plant is built in Ranzan, Saitama Prefecture. |
| May 1997 |
Marugame Plant is certified under ISO 9002. |
| August 1997 |
The Company's head office is moved and rebuilt in Doki-cho, Marugame, Kagawa Prefecture. |
| March 2000 |
Building material development operations are moved to the R&D Center. |
| April 2000 |
Tadotsu Plant is certified under ISO 9002. |
| May 2002 |
Marugame Plant shifts to ISO 9001 certification. |
| August 2002 |
No. 2 Tokushima Plant shifts to ISO 9001 certification. |
| December 2002 |
Tokushima Plant is certified under ISO 14001. |
| February 2003 |
Tadotsu Plant shifts to ISO 9001 certification. |
| March 2003 |
Marugame Plant is certified under ISO 14001. |
| April 2003 |
The Company ceases trading of its shares on the Osaka Securities Exchange. |
| February 2004 |
Prototype Building is constructed at the R&D Center. |
| July 2006 |
Shikoku OM (Shanghai) Co.,Ltd. is established in Shanghai. |
