Management milestones
Business milestones
- 1923
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Yasutaro Terasaki founded Terasaki Electric Works in Shikanjima-cho, Konohana-ku, Osaka City to start manufacturing and selling knife switches, distribution boards and switchgears
- 1923
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Started manufacturing and sales of knife switches
- 1926
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Delivered switchgears and distribution boards for the modern Asahi Kaikan building in Osaka
- 1929
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Relocated to Kasugade-cho, Konohana-ku, Osaka City following the expansion of the business
- 1933
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Completed a new factory (660m2 of floor space) in Okishima-cho, Konohana-ku, Osaka City, and relocated
- 1933
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Delivered dead-front type switchboards for subway stations in Osaka City
- 1937
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Registration of the company emblem (left) and distribution board catalogue from that year (right)
- 1941
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Completed a new factory in Kami-mura, Nakakawachi-gun, Osaka Prefecture (7,500m2 lot and 2,300m2 factory floor space; 60 employees), and relocated (presently the Kami Factory)
- 1946
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Established Terasaki Electric Works Co., Ltd. in Kami-mura, Nakakawachi-gun, Osaka Prefecture (current head office location)
- 1946
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Received many distribution board orders for the Allied Occupation
- 1947
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Opened the Tokyo Sales Office in the Nihonbashi district of Chuo-ku, Tokyo
- 1947
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Developed and started manufacturing air circuit breakers (ACB)
First delivery of marine switchboard for the Maiko Maru built at the Hiroshima Shipyard of Mitsubishi Heavy Industries
- 1948
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Developed and started manufacturing molded case circuit breakers (MCCB)
- 1949
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Switchgear orders rapidly increased for the 5th planned shipbuilding
- 1953
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Obtained first certification from Nippon Kaiji Kyokai (NK) for ACB (A-1 type 600AF)
- 1954
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Obtained first type approval from Nippon Kaiji Kyokai (NK) for MCCB (TO-2 type 60AF)
- 1955
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Established Terasaki Electric Co., Ltd.Formed the Terasaki Labor Union
- 1956
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Established Hannan Electric Works Co., Ltd. in Hannan-cho nishi, Abeno-ku, Osaka City to increase the production capacity of marine switchgear
- 1958
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Installed a revolutionary large capacity short-circuit test generator (No. 1 generator)
- 1958
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Started manufacturing and sales of marine group starter panels