| Home > Company Profile > Corporate History
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Mar. 1949 |
Established with capital 5,000,000 yen |
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Mar. 1952 |
Registered patent of Daiho Caisson Method |
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Feb. 1962 |
Enlisted in Tokyo Stock Market (Secondary Sec.) |
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Jul. 1964 |
Commencement of 1st Overseas Dam Project in Iran |
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Jan. 1971 |
Registered patent of Daiho Dolphin Dock Method |
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Aug. 1972 |
Enlisted in Tokyo Stock Market (Primary Sec.) |
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Apr. 1975 |
Opened Office in Taiwan |
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Apr. 1978 |
Opened Office in Madagascar |
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Apr. 1979 |
Opened Office in Malaysia |
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Apr. 1980 |
Opened Office in Bangkok |
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Nov. 1984 |
Registered patent of Earth-pressure Shield Method |
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Jan. 1987 |
Registered patent of Multi-cutter Shield Method ("DOT") |
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Nov. 1993 |
Registered patent of Eccentric Multi-Axis Shield Method ("DPLEX") |
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Oct. 1994 |
Registered patent of Un-manned Full Automatic Pneumatic Caisson Method
("DREAM Method") |
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May. 1997 |
Awarded R & D Prize for DPLEX Shield Tunneling Method by Japan Civil
Engineers' Association |
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Apr. 1999 |
Opened Office in Cambodia |
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Mar. 2000 |
Obtained ISO9001 Certificate for All Branches.
50th Anniversary for Establishment |
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May. 2000 |
Commencement of Taiwan High Speed Rail Civil Works Contract C220 |
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Mar. 2002 |
Obtained ISO14001 Certificate for HQ & All Branches |
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Jul. 2002 |
Obtained ISO9001 Certificate for HQ |
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Apr. 2008 |
Opened Office in Dubai |
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(*) For details of DOT, DPLEX, J-DPLEX and DREAM Method, please refer to
"R & D and Technologies" below-mentioned. |
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