Company History
| In Meiji Period | usu, the father of founder Hideyuki Murayama, starts production and distribution of “Sue eyedrops” in the Sue district of Fukuoka. Jan. 1917 Establishes Taiyo Pharmaceutical Limited Partnership Company in the city of Nogata, Fukuoka |
| Nov. 1924 | Moves to Higashi Ward, Fukuoka and changes its name to Tenyosya. |
| Nov. 1938 | Moves to Minami Ward, Fukuoka. |
| Jun. 1944 | Temporarily halts operations after being dissolved under Japan’s wartime reorganization of businesses (which created a single pharmaceutical manufacturer in the prefecture). |
| Jul. 1947 | Is reestablished as Tetsu Peptone Chemical Manufacturing Co., Ltd., after World War II ends. |
| Jan. 1948 | Reestablishes Tenyosya Co., Ltd., as a sales company. |
| Jul. 1950 | Merges with Tenyosya Co., Ltd., and changes its name to Tenyosya Chemical Co., Ltd. |
| Jul. 1952 | Changes its name to Tenyosya Pharmaceutical Industry Co., Ltd. |
| Jan. 1971 | Joins the Muromachi Group |
| Nov. 1996 | Builds a new head office and plant in Omuta, Fukuoka and relocates to that location. |
| Sep. 1998 | Changes its name to Muromachi Chemicals Inc. |
| Sep. 1999 | Builds Dai-ni Pharmaceuticals Plant. |
| Oct. 1999 | Acquires ISO9001 certification. |
| Apr. 2003 | Establishes a logistics warehouse near the head office. |
| May 2005 | Establishes Tenyosya Pharmaceutical Co., Ltd. |
| Sep. 2005 | Opens the Tokyo Branch. |
| Jun. 2006 | Starts health food production factory operation. |
| Nov. 2006 | Starts surface treatment factory operation. |
| Jul. 2009 | New office is completed. |
| Mar. 2010 | Starts compound plant operation. |
| Aug. 2010 | Exits the surface treatment business. |
| Dec. 2010 | Muromachi (Shanghai) Trading Co., Ltd. established. |
| Feb. 2011 | Builds Dai-san Pharmaceuticals Plant. |
| Mar. 2011 | Starts aqueous urea plant operation. |
| Oct. 2011 | Tsukuba plant transferred from Muromachi Technos Co., Ltd. |
| Oct. 2013 | Shinkatsudachi warehouse is completed. |
| Nov. 2013 | Tokyo branch moves to Kanda Surugadai, Chiyoda-ku, Tokyo. |
| Oct. 2014 | Acquires all shares of Toshin Chemical Industry Co., Ltd. that becomes 100% subsidiary. |
| Dec. 2014 | Muromachi Chemicals Inc. and Muromachi Technos Co., Ltd. merge and launch operation as Muromachi Chemicals Inc. |
| Jun. 2016 | Builds a new ink adhesive plant at the Tsukuba Plant. |
| Oct. 2016 | Exits the functional resin compound business. |
| Nov. 2016 | Builds a new pharmaceutical jelly plant at the Omuta Head Office. |
| May 2017 | Absorbs Toshin Chemical Industry Co., Ltd., in a merger. |
| Aug. 2017 | Builds a new pharmaceutical synthesis plant at the Omuta Head Office. |
| Jun. 2018 | Absorbs Tenyosya Pharmaceutical Co., Ltd., in a merger. |
| Dec. 2019 | Appoints Jun’ichi Aoki to serve as president. Appoints Tetsuro Murayama to serve as representative director and chairman. Appoints Jun’ichi Aoki to serve as representative director and president. |
| Dec. 2019 | Closes the Saitama Plant. |
| Jan. 2020 | Opens the Saitama Development Center in the city of Wako, Saitama. |