| Singles | |
|---|---|
| 2012 All Japan Indoor Tennis Championships | |
| Champion |
|
| Runner-up |
|
| Final score | 6–7(5–7), 6–1, 6–2 |
Dominik Meffert was the defending champion but decided not to participate.
Tatsuma Ito won the title, defeating Malek Jaziri 6–7(5–7), 6–1, 6–2 in the final.