| 1932 |
Sanmatsu Industry was founded by Mr. Matsumoto Tsurujyu. |
| Started fabrication of chemical equipment. |
| 1948 |
KOTOBUKI Iron Works, Ltd. and its factory was established in Kawasaki. |
| 1961 |
Established Yokkaichi factory.(Mie pref near Nagoya) |
| Opened Saga branch office.(Saga pref in Kyushu near Fukuoka) |
| 1963 |
Started fabrication of Titanium equipment. |
| 1965 |
Started delivery of stainless steel fermentation tanks to winery and distillery. |
| 1969 |
Mr. Matsumoto Minoru took office as president. |
| 1973 |
Started delivery of sanitary equipment to food and pharmaceutical companies. |
| 1974 |
Damaged Yokkaichi factory by Utsube river flood, shortly restored and started fabrication. |
| 1978 |
Delivered large sized fermentation tanks to beer brewery. |
| 1981 |
Completed Kawasaki head office building. |
| Relocated Kawasaki factory to Chiba pref Sodegaura city. |
| 1986 |
Lauched Double Canted Decanter Type MTC. |
| 1990 |
Changed registered trade name to KOTOBUKI TECHREX, Ltd. |
| 1992 |
Delivered Ti-clad lined bridge piers for Tokyo Bay Aqua Line. |
| Delivered Ti frame for JAMSTEC deep sea probe. |
| 1995 |
Launched microbrewery equipment at the revision of liquor tax law. |
| 1998 |
Delivered fermentation tanks, etc collaboration with Korean fabricator. |
| 2003 |
Invited trainees from Chongqing Light Industry Machinery Factory, China. |
| 2004 |
Established Shanghai KOTOBUKI TECHREX, Ltd. (100% KOTOBUKI Japan invested) |
| 2006 |
Invited trainees from Shanghai KOTOBUKI TECHREX, Ltd. |
| 2007 |
Mr. Matsumoto Noriyuki took office as president. |
| 2008 |
Started recruitment of engineers from Myanmmar. |
| 2009 |
Established Chiba head factory, combined Kawasaki head office and Chiba factory. |
| Invited trainees from Myanmmar. |
| 2010 |
Established KOTOBUKI TECHREX (Thailand) Ltd. in Ayutthaya city. (100% KOTOBUKI Japan invested) |
| 2011 |
Damaged Ayutthaya factory by flood, continued fabrication at temporary factory. |
| 2012 |
Restored Ayutthaya factory and started fabrication. |
| Established Jiangsu KOTOBUKI TECHREX, Ltd. in Haimen city. (100% KOTOBUKI Japan invested) |
2014 |
Started fabrication at Jiangsu KOTOBUKI TECHREX, Ltd. |
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