| 2016 Rakuten Japan Open Tennis Championships | |
|---|---|
| Date | 3–9 October |
| Edition | 43rd |
| Category | ATP World Tour 500 |
| Draw | 32S/16D |
| Surface | Hard / outdoor |
| Location | Tokyo, Japan |
| Champions | |
| Singles | |
 Nick Kyrgios | |
| Doubles | |
 Marcel Granollers /  Marcin Matkowski | |
The 2016 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on outdoor hard courts. It was the 43rd edition of the Japan Open, and part of the 500 Series of the 2016 ATP World Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from October 3–9, 2016.