| 1940 | Founder Takeo Kuramoto established Kyoritsu Electronic Research Institute and began manufacturing electrical measuring instruments. |  |
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| 1947 | Restarted the business with tester repairing after the war. | |
| 1950 | Incorporated the Institute and established “Kyoritsu Electrical Instruments Works, Ltd.”. | |
| 1951 | Created English catalog for overseas market with the company name of KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD. Started to develop oversea sales channels. |
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| 1955 | Started sales of pocket size mini tester “TK-30” not only in domestic market but also in Canada, the U.S., and Europe countries. | |
| 1956 | Started sales of “TK-60” high-end model of mini tester. | |
| 1957 |
Established sales channel in the U.S. market with the inquiry from U.S. Department of Commerce. |
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| 1960 |
The first building of headquarters was completed. |
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| 1961 | Expanded the lineup of TK series: “TK-70”, “TK-90”, and “TK-100”. |  |
| 1962 | Enforced the management organization and management departments. Issued the first internal newsletter. |
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| 1963 | New large-scale factory was completed in Gyoda city of Saitama prefecture. (The number of employees reached 300.) Made a successful bid on measuring instruments in Greece. Taking it opportunity, started development of calibrators for hand-held measuring instruments and testers. |
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| 1965 | Successfully developed Japan’s first clamp meter and started production and sales. KS clamp meters and panel meters became the main products. The products were exported to many countries from our Gyoda factory and “KEW” brand spread over 60 countries centering in Europe countries. |
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| 1968 | Developed compact DC multi-range clamp meter “KS-7” first in the world. | |
| 1970 | Ehime factory in Seiyo city of Ehime prefecture was completed. |  |
| 1974 | Produced dwell tachometer for automotive engine maintenance. Enforced the domestic sales force taking the influence of simultaneous global recession into consideration. |
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| 1979 | Wide angle meter was certified by Lloyd's Register first in Japan. Developed auto-ranging digital clamp meter with peak hold function “KS-777 (MODEL 2001)” first in Japan. |
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| Developed insulation resistance tester “3301”: 3-range and capable of making measurement on low to high voltage circuits. |  |
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| Uwajima factory in Uwajima city of Ehime prefecture was completed to ensure a stable supply of parts. |  |
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| 1981 | Ehime factory obtained approval of JIS mark certification. Introduced robots and NC process machines in manufacturing site and advanced FA (Factory Automation). |
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| 1984 | Masamichi Kuramoto succeeded to the position of president from Takeo Kuramoto. | |
| 1985 | Osaka sales office was opened. | |
| 1987 | KEW (Thailand) Ltd. was established with 100% funding from Kyoritsu and the factory was completed in Navanakorn Industrial Estate, Klongluang, Pathumthani, Thailand in December. |  |
| 1988 | New York Representative office was opened to facilitate the communication with oversea distributors. (Closed) Gyoda factory was closed, and two factories: Ehime and KEW (THAILAND) LTD. operated to manufacture and export products. |
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| 1989 | The construction of new building for the headquarters was completed. |  |
| 1992 | Ehime factory obtained ISO 9001 certification. | |
| 1995 | Sendai sales office was opened. (Currently integrated into Tokyo sales dept.) | |
| 1996 | KEW (Thailand) Ltd. obtained ISO 9002 certification. | |
| 1999 | Uwajima factory obtained ISO 9001 certification. | |
| 2001 | "KEW MATE 2000", a digital multi meter with AC/DC open clamp sensor, received the Small and Medium Enterprise Agency Commissioner’s award at the JECA (Japan Electrical Construction Association) Fair 2001. |  |
| 2003 | Kewtech Corporation Ltd. was established in the U.K. |  |
| Shanghai Representative office was opened in China. | ||
| 2004 | Developed and started sales of “MODEL 4200” Earth Clamp. Clamp type earth resistance tester first in Japan. |
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| 2007 | Nagoya Sales office was opened. | |
| 2008 | Kew Europe Office was opened in Italy. |  |
| Kyoritsu Shanghai Trading Company Limited was established. (Shanghai Representative office was closed.) |  |
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| Uwajima factory was closed and integrated into Ehime factory. | ||
| 2011 | The first floor of KEW (Thailand) Ltd. was submerged by flood. Temporary office was opened to maintain the production line. |
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| 2012 | The damaged building and factory of KEW (Thailand) Ltd. was restored and restarted the production in the own factory. | |
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Developed and started sales of DC milliamp Clamp Meter "KEW 2500". |
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| Intelligent socket tester "KEW 4500" received the Small and Medium Enterprise Agency Commissioner’s award at JECA (Japan Electrical Construction Association) Fair 2012. |  |
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| 2013 | Intelligent Socket Tester “KEW 4500” received METI-SHIKOKU Director-General's Prize at the 5th of the Monodzukuri Nippon Grand Award. | |
| Simplified Earth Tester "KEW 4300" received the technological Innovation prize from Shikoku Industry & Technology Promotion Center. |  |
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| 2015 |
Kew(Thailand)Ltd. , the 2nd factory was completed. |
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The 75th anniversary of the founding of Kyoritsu. |
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Kyoritsu Instruments Asia Pte Ltd. was established in Singapore. |
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| 2016 | Ior Logger "KEW 5050" received the Small and Medium Enterprise Agency Commissioner’s award at the JECA (Japan Electrical Construction Association) Fair 2016. |  |
| 2017 | Insulation Tester "KEW 3441BT" received Kanto Electrical Inspection Safety Association Director’s award at the JECA (Japan Electrical Construction Association) Fair 2017" |  |
| 2018 | Intelligent Socket Tester "KEW 4505" received Japan Electrical Construction Association Encouragement award at the JECA (Japan Electrical Construction Association) Fair 2018". |  |
| 2019 | Shikoku sales office was opened in Ehime Prefecture. | |
| Portable Appliance Tester "KEW 6206" received Japan Electrical Construction Association Encouragement award at the JECA (Japan Electrical Construction Association) Fair 2019". |  |
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| 2020 |
The 80th anniversary of the founding of Kyoritsu. 【80th anniversary special website】 |
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| 2022 | Multi-function Installation Tester "KEW 6514BT" received the Small and Medium Enterprise Agency Commissioner’s award at the JECA (Japan Electrical Construction Association) Fair 2022. |  KEW 8601 KEW 6514BT |
| 2023 | Kyushu sales office was opened in Fukuoka Prefecture. | |
| Multi-function Installation Tester "KEW 6041BT" received Minister of Economy, Trade and Industry award at the JECA (Japan Electrical Construction Association) Fair 2023" |  |
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| 2024 | Intelligent Socket Tester "KEW 4555BT" received Tokyo Metropolitan Industrial Technology Research Center Director’s award at the JECA (Japan Electrical Construction Association) Fair 2024. |  KEW 4555BT KEW 8345 |
| Intelligent Socket Tester and Signal Source for Intelligent Socket Tester received the prize of the Commissioner of Small and Medium Enterprise Agency at Local Commendation for Invention of Shikoku 2024. |
