Tansan Maru
| Name | Tansan Maru |
| Type | Steamer
|
| GRT | 2,443 tons |
| Country |  Japanese |
| Built | 1894
|
| Builder | Hawthorn, Leslie & Co., Ltd., Newcastle
|
| Operator | Sho Sho Yoko, Uraga
|
| History |
|
U-boat attacks on Steamer Tansan Maru
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties |
| 1 | 22 May 1917 | U 46 (Leo Hillebrand) | Sunk | about 80 miles west of Annagh Head, Ireland
| 54° 10'N, 12° 40'W
| Boston - Manchester
| general cargo
| 0
|
Position of attack on Tansan Maru
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