Koa Maru as Grande-Terre
| Name | 興亞丸 Koa Maru |
| Former Names | SS Anatolian, Grande-Terre, SS Pasat |
| Ship Type | Cargo Ship/Whaler |
| Launched/Completed | 1932 |
| Builder | Swan, Hunter & Wigham Richardson, Ltd., Wallsend, UK |
| Tonnage | 2,024 tons |
| Owner | Kyokuyo Hogei K. K., Tokyo |
| Loss Date | April 4, 1943 |
| Location | 13-30N, 161-56E |
| Circumstances | Sunk by torpedo |
| Number of Men Lost | 16 crew members |
| Name of Submarine | USS Porpoise (SS-172) | Patrol Number 5 |
| Commanding Officer | LCDR John R. McKnight, Jr. | Attack No. 725 |
Sinkings by Selected Submarines
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