- 1893
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Salvage Department of Mitsubishi Nagasaki Dockyard started full-scale salvage business in December.
- 1917
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Tokyo Salvage Co., Ltd. was established.
Salvage Department of Mitsubishi Nagasaki Dockyard, Yamasina Kaiji and Matsuda Kaiji were merged to found Nippon Kaiji Kogyo Co., Ltd. (Osaka)
- 1918
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Teikoku Kaiji Kogyo Co., Ltd. was established.
- 1924
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Nippon Kaiji Kogyo Co., Ltd. and Teikoku Kaiji Kogyo Co., Ltd. were unified,and Imperial Salvage Co., Ltd. was founded.
From this time to the beginning of Showa era, salvage industry in Japan made rapid growth through competition between Teikoku Salvage and Tokyo Salvage.
- 1934
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At the request of the Japanese underwriters who requested further sound development and stable management of the Japanese shipping industry, the Nippon Salvage Co., Ltd. was established through amalgamation of Teikoku Salvage Co., Ltd. and Tokyo Salvage Co., Ltd., and most of salvage facilities and personnel of the both companies were succeeded, and the Nippon Salvage Co., Ltd. made new start on 21 September.
- 1937
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Salvage of passenger ship Asama Maru aground in Hong Kong. (Salvage accomplished in success in 1938.)
- 1939
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Office opened at Shanghai, China
- 1940
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Institute of technology as well as training facility of diving was newly built at Tsukishima, Tokyo.
- 1949
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Underwater electric cutting put into practical use.
- 1965
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Underwater electric welding put into practical use.
- 1979
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Marine Construction Department was set up.
- 1992
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Yoshida, president of the time assigned board of director of International Salvage Union for the first Japanese.
(Director, Shimonishi assigned ISU board member as of 2020.)
- 1995
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Obtained Certification of ISO 9002.
- 1998
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A large ocean going salvage tug Koyo Maru (10,000 HP) built and put into practical use.
- 2001
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Obtained ertification of ISO 9001.
Multi purpose work barge Kaiyo built and put into practical use.
- 2005
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Multiple purpose work barge Masakuni built and put into practical use.
Small ROV deployed.
- 2006
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Obtained certification of ISO 14001.
- 2007
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Salvage tug Hayashio Maru built and put into practical use. (Presently chartered by Nissal Marine Co., Ltd.)
- 2008
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Multi purpose work barge Mishima built and put into practical use.
- 2010
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Constructed Shin-Moji warehouse.
- 2011
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Engaged in lots of salvage and wreck removal services due to Great East Japan Earthquake.
- 2012
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Rebuilt Moji Branch Office.
- 2013
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Mixed gas diving equipment deployed.
- 2014
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New warehouse adjoining training pool built and put into practical use.
80th anniversary since foundation of the company.
- 2016
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Multipurpose work barge Kaishin built and put into practical use.
- 2019
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Saturation diving system adopted.
- Present
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In order to respond to request from shipping and insurance industry etc., we endeavour to inherit and devote ourselves to the study of salvage skill which has been fostered since Meiji Era, and we are still up to the present with the first class international reputation in the industry after some 120 years.
