| Native Name: | 大文字 研二 |
| Daimonji Kenji | |
| Birth Name: | Kenji Tamura |
| Birth Date: | 1940 2, df=yes |
| Birth Place: | Shimogyō-ku, Kyōto, Japan |
| Weight: | 106kg (234lb) |
| Heya: | Nakamura → Nishonoseki |
| Record: | 598-579-15-1 (draw) |
| Debut: | March, 1956 |
| Highestrank: | Maegashira 5 (January, 1970) |
| Retireddate: | July, 1973 |
| Eldername: | Nishiiwa |
| Yushos: | 1 (Jūryō) 1 (Jonidan) |
| Update: | June 2020 |
Daimonji Kenji (born 21 February 1940 as Kenji Tamura) is a former sumo wrestler from Kyōto, Japan. He made his professional debut in March 1956 and reached the top division in November 1966. His highest rank was maegashira 5. Upon retirement from active competition he became an elder in the Japan Sumo Association, under the name Nishiiwa. He coached at Taihō/Ōtake stable, until reaching the Sumo Association's mandatory retirement age of 65 in February 2005.[1]