Nummer: 25809
| Area : | Indic Ocean |
| Date of attack : | 08.01.1942 |
| Time of attack : | 07:16 |
| Nationality of U-boat : | Japanese |
| U-boat : | I-156 |
| Commander : | Ohashi |
| presumed target type : | Steam Freighter |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 08.01.1942 |
| Nationality of target : | Dutch |
| Actual type of target : | Steam Freighter |
| Name of target : | Van Rees |
| Year of launch : | 1913 |
| Actual tonnage : | 3000 BRT |
| Actual result : | sunk |
| Position of target : | 80nm S Tjilatjap |