Koki Kitahara
| Koki Kitahara | |
|---|---|
| Born | March 9, 1964 Fukuoka, Fukuoka, Japan |
| Professional wrestling career | |
| Ring name(s) | Koki Kitahara Tatsumi Kitahara Sumo Hara |
| Billed height | 1.82 m (6 ft 0 in) |
| Billed weight | 110 kg (240 lb) |
| Trained by | Genichiro Tenryu Satoru Sayama |
| Debut | April 8, 1988 |
| Retired | June 11, 2018 |
Tatsumi Kitahara (北原辰巳, Kitahara Tatsumi) (born March 9, 1964) is a Japanese retired professional wrestler better known by his ring name Koki Kitahara (北原光騎, Kitahara Kōki).