| In 1966 | Establishment of Kokusai Cable Ship Co., Ltd.(KCS) |
| 1969 | Japan Sea Submarine Cable(JASC) installation(KDD Maru) |
| 1976 | Japan-China Cable（ECSC） installation（KDD Maru） |
| 1977 | Okinawa-Luzon-Hong Kong Cable(OLUHO) installation(KDD Maru) |
| 1979 | Okinawa-Taiwan Cable installation（KDD Maru） |
| 1980 | Kuantan-Kuching Cable installation(KDD Maru) Japan-Korea Cable(JKC) installation(KDD Maru) |
| 1982 | ASEAN Thailand-Malaysia-Singapore Cable installation(KDD Maru) |
| 1984 | Okinawa-Ninomiya Cable (Okinawa cable) installation(KDD Maru) |
| 1986 | Japan-China Cable restoration & installation on the shore end (KDD Maru) |
| 1988 | The 3rd Trans-Pacific Cable(TPC-3) installation(KDD Maru) |
| 1989 | Chikura-Ninomiya Cable installation(KDD Maru) |
| 1991 | The 4th Trans-Pacific Cable(TPC-4) installation(KDD Maru) |
| 1992 | Completion of the KDDI OCEAN LINK(KOL) Chikura-Miyazaki Cable installation(KDD Maru) The 4th Trans-Pacific Cable(TPC-4) installation(KOL) |
| 1993 | APC（Asia-Pacific-Cable) installation（KOL) CJ-FOSC（China-Japan-Fiber Optical System Cable） installation（KOL) |
| 1994 | RJK（Russia-Japan-Korea) Cable installation（KOL) The 5th Trans-Pacific Cable(TPC-5) installation(KOL) |
| 1995 | The 5th Trans-Pacific Cable(TPC-5) installation(KOL) |
| 1996 | APCN Cable installation（KOL) The 5th Trans-Pacific Cable(TPC-5) installation(KOL) |
| 1997 | FLAG Cable installation(KOL) |
| 1998 | Exhibition of the KDDI PACIFIC LINK(KPL) JIH（Japan Information Highway） Cable installation（KOL) JIH（Japan Information Highway） Cable installation（KPL) |
| 1999 | Obtained the certificate of ISO9002：1994 China-US Cable installation（KPL) Japan-US Cable installation（KPL) |
| 2001 | EAC（East Asian Crossing Cable System） installation（KOL) EAC（East Asian Crossing Cable System） installation（KPL) AJC（Australia-Japan Cable System） installation(Kouki Maru） C2C installation（KPL) C2C installation(Kouki Maru) merged with Kokusai Marine Engineering Co., Ltd. |
| 2004 | Obtained the certificate of ISO14001：1996 |
| 2007 | RJCN Cable installation(KPL) |
| 2008 | RJCN Cable installation(KPL) |
| 2009 | UNITY Cable installation(KPL) |
