The 2015 Shimadzu All Japan Indoor Tennis Championships was a professional tennis tournament played on carpet. It was the 19th edition of the tournament which was part of the 2015 ATP Challenger Tour. It took place in Kyoto, Japan between 23 February and 1 March.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Japan | Go Soeda | 82 | 1 | |
| Japan | Tatsuma Ito | 94 | 2 | |
| Japan | Yūichi Sugita | 131 | 3 | |
 Australia | John Millman | 149 | 4 | |
| Japan | Hiroki Moriya | 158 | 5 | |
 China | Zhang Ze | 180 | 6 | |
 Poland | Michał Przysiężny | 185 | 7 | |
| Australia | Benjamin Mitchell | 212 | 8 |
The following players received wildcards into the singles main draw:
Hiroyasu Ehara Issei Okamura Takashi Saito Takao SuzukiThe following players received entry into the main draw using a protected ranking:
Karunuday SinghThe following players received entry from the qualifying draw:
Yūichi Ito
Kim Cheong-Eui Hiroki Kondo Arata OnozawaSee main article: article and 2015 Shimadzu All Japan Indoor Tennis Championships – Singles.
Michał Przysiężny def. John Millman, 6–3, 3–6, 6–3See main article: article and 2015 Shimadzu All Japan Indoor Tennis Championships – Doubles.
Benjamin Mitchell / Jordan Thompson def. Go Soeda / Yasutaka Uchiyama, 6–3, 6–2