| 1956 | January | Established the Mizutani Store as a private store in Nakamura-ku, Nagoya City. Started selling electric wires. |
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| 1963 | April | Reorganized as Mizusho Electric Wire Co., Ltd. with a capital of 1 million Yen. |
| 1975 | January | Built a new office building at the present address in Shirakane, Showa-ku, Nagoya City. |
| May | Opened the Osaka Business Office in Nishinakajima 1-chome, Yodogawa-ku, Osaka City. | |
| 1977 | April | Increased the capital to 35 million Yen. |
| 1981 | October | Established an subsidiary company, "Mizusho Denko Co., Ltd." in Takabari, Idaka-cho, Meito-ku. |
| 1985 | February | Changed the company name to "Mizusho Co., Ltd." |
| 1988 | October | Established an subsidiary company, "Mizusho Denso Co., Ltd." in Higashi Shin-machi, Kariya City. |
| 1989 | February | Established the Mikawa Branch Office in Ote-machi, Kariya City. |
| November | Accepted an investment from Nagoya Small and Medium Business Investment & Consultation Co., Ltd. Increased the capital to 49 million Yen. |
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| 1991 | May | Increased the capital to 52 million Yen. |
| 1992 | April | Relocated the Mikawa Branch Office to Sumiyoshi-cho, Anjo City. |
| 1993 | June | Increased the capital to 57 million Yen. |
| 1997 | August | Increased the capital to 97 million Yen. |
| 1997 | January | Closed the Osaka Business Office. |
| October | Completed the construction of a business office and factory in Ogakie-cho, Kariya-City. Relocated the Mikawa Branch Office and Mizusho Denso Co., Ltd. |
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| 2000 | January | Obtained ISO9001 Certification Acquired the ISO9002 Certification. |
| 2001 | October | Merger Mizusho Denko Co., Ltd. ＆ Mizusho Denso Co., Ltd.(integrated manufacturing and sales). |
| 2003 | March | Started operating a factory in Shenzhen, Guangdong, China. |
| 2004 | January | Established the subsidiary company Mizusho Electronics (Hong Kong) Limited. |
| 2005 | February | Established the subsidiary company Mizusho Electronics (Jiashan) Limited. Started producing control panels for industrial equipment. |
| 2006 | July | Obtained ISO14001 Certification |
| 2010 | August | Established the affiliate company Forenergy Co.,Ltd. Started handling photovoltaic power generation equipment. |
| 2011 | January | Began selling LED's from Forenergy Co.,Ltd. |
| March | Started producing control panels for industrial equipment at the Kariya Factory. | |
| 2012 | February | Incorporated the Shenzhen Factory and established Mizusho Electronics (Shenzhen) Ltd. |
| 2013 | April | Merger Forenergy Co.,Ltd. |
| June | Concluded a sales contract with Shenzhen Pu Sheng Yuan (PSY) Lighting Co., Ltd in Japan. | |
| September | Established Siam Mizusho Manufacturing Co., Ltd. in Thailand. | |
| December | Siam Mizusho Manufacturing Co., Ltd. started production. | |
| 2015 | May | Established Yoro Satozukuri Co., Ltd. in Yoro Town, Gifu Prefecture |
| June | Full Ownership of Siam Mizusho Manufacturing Co., Ltd | |
| August | New Head Office (BCP measures) | |
| 2020 | April | Transferred Siam Mizusho Manufacturing Co., Ltd. to establish a new plant |
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