2013 All Japan Indoor Tennis Championships – Singles
| Singles | |
|---|---|
| 2013 All Japan Indoor Tennis Championships | |
| Champion |
 John Millman
|
| Runner-up |
 Marco Chiudinelli
|
| Final score | 4–6, 6–4, 7–6(7–2) |
Tatsuma Ito was the defending champion but decided to participate at the 2013 BNP Paribas Open instead.
In the final, fourth seeded John Millman outlasted second seeded Marco Chiudinelli in 2 hours and 26 minutes to claim the title with a scoreline of 4–6, 6–4, 7–6(7–2).
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