Kenkyū Era
建久 (けんきゅう)
| Japanese Year | Western Year | 
|---|---|
| Kenkyū 1 | 1190 | 
| Kenkyū 2 | 1191 | 
| Kenkyū 3 | 1192 | 
| Kenkyū 4 | 1193 | 
| Kenkyū 5 | 1194 | 
| Kenkyū 6 | 1195 | 
| Kenkyū 7 | 1196 | 
| Kenkyū 8 | 1197 | 
| Kenkyū 9 | 1198 | 
| Kenkyū 10 | 1199 | 
| Japanese Year | Western Year | 
|---|---|
| Kenkyū 1 | 1190 | 
| Kenkyū 2 | 1191 | 
| Kenkyū 3 | 1192 | 
| Kenkyū 4 | 1193 | 
| Kenkyū 5 | 1194 | 
| Kenkyū 6 | 1195 | 
| Kenkyū 7 | 1196 | 
| Kenkyū 8 | 1197 | 
| Kenkyū 9 | 1198 | 
| Kenkyū 10 | 1199 |