| 1951/4Showa 26 | Establishment of Myotoku Seisakusho Co.,Ltd. as a processing industry of precision machine parts with a Capital of 200,000 yen. |
| 1970/4Showa 45 | Established Yaguchi Factory (Ota-ku, Tokyo) and Mizusawa Factory (Mizusawa City, Iwate Prefecture) |
| 1972/4Showa 47 | Starting sales of air-driven vacuum ejectors CV-05 and CV-10 under the brand of "CONVUM" |
| 1980/5Showa 55 | Established Sendai Factory (Kurokawa District, Miyagi Prefecture) |
| 1982/1Showa 57 | Changed company name to Myotoku Ltd. |
| 1982/6Showa 57 | Changed Yaguchi Factory to Technology Development Center (Yaguchi Office) as a product development base |
| 1984/6Showa 59 | Moved the Mizusawa Factory to Esashi city in Iwate Prefecture and changed the name to Iwate Factory. |
| 1988/7Showa 63 | Established Akita Myotoku Ltd. (Kitaakita-gun, Akita Prefecture) |
| 1989/4pingcheng | Iwate Factory was spun off as Iwate Myotoku Co., Ltd., and Sendai Factory was spun off as Sendai Myotoku Co., Ltd. (the capital relationship was dissolved in December 2000). |
| 1990/10pingcheng ２ | Developed pressure sensor (MVS-030) at Myotoku Akita Co., Ltd. |
| 1998/8pingcheng 10 | Changed trade name from Iwate Myotoku Ltd., to Convum Corporation |
| 2003/4pingcheng 15 | Established Myotoku Shanghai Trading Co. Ltd. (actualy Myotoku Convum China Co., LTD.) in Shanghai, China |
| 2004/9pingcheng 16 | Established Convum Korea Ltd., in Annyang, South Korea. |
| 2004/10pingcheng 16 | Listed stocks on JASDAQ Securities Exchange (actually JASDAQ at the Tokyou Stock Exchange). |
| 2005/10pingcheng 17 | Terminated Akita Myotoku Ltd. as a company and absorbed it into Convum Corporation |
| 2006/4pingcheng 18 | Terminated Convum Corporation as a company and absorbed it into Myotoku, Ltd. |
| 2008/6pingcheng 20 | Established Convum (Thailand) Co., Ltd., in Bangkok, Thailand |
| 2010/4pingcheng 22 | Listed on the Osaka Securities Exchange (JASDAQ market) due to the merger of the Jasdaq Securities Exchange and the Osaka Securities Exchange. |
| 2010/10pingcheng 22 | Listed on the Osaka Securities Exchange JASDAQ (Standard) (currently the Tokyo Stock Exchange JASDAQ (Standard)) due to the integration of the Osaka Securities Exchange JASDAQ Market, the Exchange Hercules Market, and the Exchange NEO Market. |
| 2011/1pingcheng 23 | Moved Myotoku Korea Co., Ltd. to Seoul, South Korea |
| 2011/2pingcheng 23 | Changed the trade name of Shanghai Miaode Kongbamu Trading Co., Ltd. to Miaode Kongbamu Machinery & Equipment (Shanghai) Co., Ltd. |
| 2011/4pingcheng 23 | Starting processing and assembly parts for suction cups at Myotoku Convum China Co., Ltd. and Convum Korea Co., Ltd |
| 2012/12pingcheng 24 | Moved and combined suction cups production at Akita Factory to Iwate Factory |
| 2013/7pingcheng 25 | Listed on the JASDAQ market (standard) of the Tokyo Stock Exchange due to the integration of the stock markets of the Tokyo Stock Exchange and the Osaka Securities Exchange. |
| 2016/8pingcheng 28 | Established CONVUM USA, INC. (Currently a consolidated subsidiary) in California, USA |
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