Nummer: 25910
| Area : | Indic Ocean |
| Date of attack : | 31.01.1942 |
| Time of attack : | 06:26 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-164 |
| Commander : | Ogawa |
| Grid : | 12.30n 80.40e |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 7000 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 3 |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Date of observation : | 30.01.1942 |
| Nationality of target : | Indic |
| Actual type of target : | Steam Freighter |
| Name of target : | Jalapalaka |
| Year of launch : | 1917 |
| Actual tonnage : | 4215 BRT |
| Actual result : | sunk |
| Position of target : | 13.00n 81.08e |