| Emperor's Cup | |
| Year: | 1931 |
| Country: | Japan |
| Num Teams: | 7 |
| Winners: | Imperial University of Tokyo LB |
| Second: | Kobun Junior High School |
| Semifinal1: | II School Club |
| Semifinal2: | Nagoya Shukyu-dan |
| Matches: | 6 |
| Goals: | 23 |
| Prev Season: | 1930 |
| Next Season: | 1932 |
Statistics of Emperor's Cup in the 1931 season.
It was contested by 7 teams, and Imperial University of Tokyo LB won the cup.
See main article: 1931 Emperor's Cup Final.
Imperial University of Tokyo LB won the cup.