| Men's Singles | |
|---|---|
| 2001 AIG Japan Open Tennis Championships | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4, 6–2 |
Sjeng Schalken was the defending champion but lost in the quarterfinals to .
Lleyton Hewitt won in the final 6–4, 6–2 against Kratochvil.
The top eight seeds received a bye to the second round.