Japan Open · ATP
Japan Open 2023
ATP 500HardTokyo, Japan14 October – 22 October 2023Prize money: 2,022,700 USD43 matchesAltitude: 40 mCourt: Fast
Champion Ben Shelton · Final: 7-6(4) 6-3
Final rounds
| Final | Ben Shelton vs Aslan Karatsev | 7-5 6-1 |
| Semifinal | Aslan Karatsev vs Shintaro Mochizuki | 6-3 6-4 |
| Semifinal | Ben Shelton vs Marcos Giron | 6-7(2) 7-6(5) 6-4 |
| Quarterfinal | Shintaro Mochizuki vs Alexei Popyrin | 7-5 2-6 7-5 |
| Quarterfinal | Aslan Karatsev vs Alex De Minaur | 6-3 6-2 |
| Quarterfinal | Marcos Giron vs Felix Auger Aliassime | 6-1 6-4 |
| Quarterfinal | Ben Shelton vs Tommy Paul | 7-6(4) 6-3 |
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