Ninji (仁治), also called Jinji, was a Japanese era name (年号,, nengō,; lit. "year name") after En'ō and before Kangen. This period started in August 1240 and ended in January 1243. The reigning emperors were Shijō-tennō (四条天皇) and Go-Saga-tennō (後嵯峨天皇).
| Ninji | 1st | 2nd | 3rd | 4th |
|---|---|---|---|---|
| 1240 | 1241 | 1242 | 1243 |
| Preceded by: En'ō |
Era or nengō: Ninji |
Succeeded by: Kangen |