| 2015 Keio Challenger | |
|---|---|
| Date | 16 November – 22 November |
| Edition | 11th |
| Surface | Hard |
| Location | Yokohama, Japan |
| Champions | |
| Singles | |
 Taro Daniel | |
| Doubles | |
 Sanchai Ratiwatana / Sonchat Ratiwatana | |
The 2015 Keio Challenger is a professional tennis tournament played on hard courts. It is the eleventh edition of the tournament which is part of the 2015 ATP Challenger Tour. It takes place in Yokohama, Japan between November 16 and November 22, 2015.