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Corpotare History
Mar. 1949 Established with capital 5,000,000 yen.
Mar. 1952 Registered patent of Daiho Caisson Method.
Feb. 1962 Enlisted in Tokyo Stock Market (Secondary Sec.).
Jul. 1964 Commencement of 1st Overseas Dam Project in Iran.
Jan. 1971 Registered patent of Daiho Dolphin Dock Method.
Aug. 1972 Enlisted in Tokyo Stock Market (Primary Sec.).
Apr. 1975 Opened Office in Taiwan.
Apr. 1978 Opened Office in Madagascar.
Apr. 1979 Opened Office in Malaysia.
Apr. 1980 Opened Office in Bangkok.
Nov. 1984 Registered patent of Earth-pressure Shield Method.
Jan. 1987 Registered patent of Multi-cutter Shield Method ("DOT").
Nov. 1993 Registered patent of Eccentric Multi-Axis Shield Method ("DPLEX").
Oct. 1994 Registered patent of Un-manned Full Automatic Pneumatic Caisson Method ("DREAM Method").
May. 1997 Awarded R & D Prize for DPLEX Shield Tunneling Method by Japan Civil Engineers' Association.
Apr. 1999 Opened Office in Cambodia.
Mar. 2000 Obtained ISO9001 Certificate for All Branches.
50th Anniversary for Establishment.
May. 2000 Commencement of Taiwan High Speed Rail Civil Works Contract C220.
Mar. 2002 Obtained ISO14001 Certificate for HQ & All Branches.
Jul. 2002 Obtained ISO9001 Certificate for HQ.
Apr. 2008 Opened Office in Dubai.
Mar. 2009 60th Anniversary for Establishment.
Jun. 2013 Opened Office in Yangon, Myanmar.
Jun. 2014 Increased capital to 6,321,475,654 yen.
Aug. 2015 Increased capital to 9,039,773,154 yen.
Mar. 2019 70th Anniversary for Establishment.
Mar. 2020 Established an Institute of Technology.
(*) For details of DOT, DPLEX, J-DPLEX and DREAM Method, please refer to "R & D and Technologies" below-mentioned.
Nov. 2020 Increased capital to 10,549,276,599 yen.
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