| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Tatsumi•Kasahara | |
| Used name | Tatsumi•Kasahara | |
| Original name | 笠原•辰己 | |
| Born | 21 January 1977 in Myokokogen, Niigata |  JPN |
| Measurements | 168 cm / 60 kg | |
| Affiliations | Japan Ground Self-Defense Force - Cold Weather Combat Training Unit — ? | JPN |
| NOC | Japan | JPN |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2006 Winter Olympics | Biathlon | JPN |
Tatsumi Kasahara | |||
| Sprint, Men (Olympic) | 47 | |||||
| Pursuit, Men (Olympic) | 50 | |||||
| Individual, Men (Olympic) | 67 | |||||
| Relay, Men (Olympic) | Japan | 12 |
