Yasaka Maru
| Name | Yasaka Maru |
| Type | Passenger steamer |
| GRT | 10,932 tons (one of the largest ships hit) |
| Country |  Japanese |
| Built | 1914 |
| Builder | Kawasaki Dockyard Co., Ltd., Kobe |
| Operator | Nippon Yusen K.K., Tokyo |
| History |
U-boat attacks on Passenger steamer Yasaka Maru
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Dec 1915 | U 38 (Max Valentiner) | Sunk | Torpedoed 60 miles from Port Said. 31.49N, 31.38E per KTB | 31.53N, 31.10E | Tees & London - Yokohama |
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