HISTORY
| 1960 | May | Established as Keihin Tanker, Co., Ltd. |
|---|---|---|
| 1961 | March | Renamed to the current trade name, Kinkai Tanker Co., Ltd. |
| November | Assumed operations of the Maruzen Oil Co., Ltd. (current Cosmo Oil Co., Ltd.) segment from Showa Oil Tanker Co., Ltd.(current SHOWA NITTAN CO., LTD.), starting business in maritime transportation of petroleum products (de facto establishment period) | |
| 1967 | January | Daiichi Kaiun Transportation Co., Ltd. joined as group company |
| 1974 | May | Started maritime transportation operations of petroleum products in ocean-going areas |
| 1979 | April | Established Enyo Shipping Transportation Co., Ltd. and delegated maritime transportation operations of crude oil and petroleum products in ocean-going areas |
| 1996 | April | Certified under ISM Code (Kinkai Marine Co., Ltd.) |
| 1998 | May | Certified under ISM Code for domestic |
| 2001 | December | Certified both to ISO 9001 & 14001 |
| 2011 | November | 50th anniversary |
| 2015 | October | Started bunkering business in Tokyo Bay |
| 2021 | November | 60th anniversary Transitioned to ISO 9001 & 14001 integrated management system |