# 2013 All Japan Indoor Tennis Championships – Singles

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$^{(7–2)}$.

## Seeds

* Yūichi Sugita (quarterfinals)
* Marco Chiudinelli (final)
* Zhang Ze (withdrew)
* John Millman (champion)
* Hiroki Moriya (semifinals)
* Michał Przysiężny (quarterfinals)
* Peter Gojowczyk (quarterfinals)
* Dominik Meffert (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 5 | Hiroki Moriya | 6$^4$ | 1 | | | | | |
| 4 | John Millman | 7$^7$ | 6 | | | | | |
| 4 | John Millman | 7$^7$ | 6 | 4 | John Millman | 4 | 6 | 7$^7$ |
| | | | | 2 | Marco Chiudinelli | 6 | 4 | 6$^2$ |
| | Matthew Barton | 6$^6$ | 4 | 2 | Marco Chiudinelli | 6 | 4 | 6$^2$ |
| 2 | Marco Chiudinelli | 7$^8$ | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Y Sugita | 6 | 6 | | | | | | | | | | | | | | | |
| | M Reid | 4 | 4 | | 1 | Y Sugita | w/o | | | | | | | | | | | |
| | G Jones | 7$^7$ | 7 | | | G Jones | | | | | | | | | | | | |
| | B Mitchell | 6$^5$ | 5 | | | | | | | 1 | Y Sugita | 6$^4$ | 7 | 3 | | | | |
| | M Gong | 7$^7$ | 1 | 3 | | | | | | 5 | H Moriya | 7$^7$ | 5 | 6 | | | | |
| SE | A Sitak | 6$^6$ | 6 | 6 | SE | A Sitak | | | | | | | | | | | | |
| | T-h Yang | 2 | 4 | | 5 | H Moriya | w/o | | | | | | | | | | | |
| 5 | H Moriya | 6 | 6 | | | | | | | | | | | | 5 | H Moriya | 6$^4$ | 1 |
| 4 | J Millman | 7$^7$ | 6 | | | | | | | | | | | | 4 | J Millman | 7$^7$ | 6 |
| Q | T Matsui | 6$^4$ | 4 | | 4 | J Millman | 4 | 6 | 7$^7$ | | | | | | | | | |
| Q | H Kondo | 6 | 6 | | Q | H Kondo | 6 | 1 | 6$^3$ | | | | | | | | | |
| Q | Adrian Sikora | 2 | 0 | | | | | | | 4 | J Millman | 6 | 3 | 6 | | | | |
| | S Groth | 7$^7$ | 6 | | | | | | | 7 | P Gojowczyk | 3 | 6 | 3 | | | | |
| | S-y Jeong | 6$^5$ | 4 | | | S Groth | 4 | 4 | | | | | | | | | | |
| WC | T Niki | 3 | 4 | | 7 | P Gojowczyk | 6 | 6 | | | | | | | | | | |
| 7 | P Gojowczyk | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | D Meffert | 6 | 6 | | | | | | | | | | | | | | | |
| WC | K Takeuchi | 3 | 4 | | 8 | D Meffert | 7$^7$ | 7$^7$ | | | | | | | | | | |
| Q | M Venus | 5 | 3 | | | A Arnaboldi | 6$^4$ | 6$^0$ | | | | | | | | | | |
| | A Arnaboldi | 7 | 6 | | | | | | | 8 | D Meffert | 6 | 3 | 4 | | | | |
| WC | Masato Shiga | 0 | 3 | | | | | | | | M Barton | 3 | 6 | 6 | | | | |
| | M Barton | 6 | 6 | | | M Barton | 7$^7$ | 6 | | | | | | | | | | |
| | Y Uchiyama | 6 | 4 | 6 | | Y Uchiyama | 6$^0$ | 4 | | | | | | | | | | |
| LL | Shuichi Sekiguchi | 3 | 6 | 0 | | | | | | | | | | | | M Barton | 6$^6$ | 4 |
| 6 | M Przysiężny | 7 | 6 | | | | | | | | | | | | 2 | M Chiudinelli | 7$^8$ | 6 |
| WC | K Uchida | 5 | 3 | | 6 | M Przysiężny | 6$^4$ | 6 | 7 | | | | | | | | | |
| | Y Bhambri | 6 | 6 | | | Y Bhambri | 7$^7$ | 3 | 5 | | | | | | | | | |
| | L-c Huang | 4 | 2 | | | | | | | 6 | M Przysiężny | 6 | 6$^9$ | 1 | | | | |
| | J Statham | 4 | 6 | 3 | | | | | | 2 | M Chiudinelli | 3 | 7$^{11}$ | 6 | | | | |
| | J Duckworth | 6 | 4 | 6 | | J Duckworth | 6$^5$ | 7$^9$ | 2 | | | | | | | | | |
| | L Saville | 6 | 4 | 0 | 2 | M Chiudinelli | 7$^7$ | 6$^7$ | 6 | | | | | | | | | |
| 2 | M Chiudinelli | 3 | 6 | 6 | | | | | | | | | | | | | | |