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.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q2 | width=85 | Q1 |
| Singles[1] | 500 | 300 | 180 | 90 | 45 | 0 | 20 | 10 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 0 |
| width=130 bgcolor=#ededed | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 | Q2 | width=85 | Q1 |
| style=background:#f5f5f5 | Singles | $310,330 | $145,750 | $72,370 | $36,185 | $18,335 | $9,650 | $1,610 | $885 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#f5f5f5 | Doubles | $91,470 | $43,220 | $20,860 | $10,850 | $5,680 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Kei Nishikori | 5 | 1 | ||
| Gaël Monfils | 8 | 2 | ||
| Tomáš Berdych | 9 | 3 | ||
| Marin Čilić | 11 | 4 | ||
| David Goffin | 14 | 5 | ||
| Nick Kyrgios | 15 | 6 | ||
| Ivo Karlović | 20 | 7 | ||
| Feliciano López | 27 | 8 |
The following players received wildcards into the singles main draw:
The following player using a protected ranking into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Nicolás Almagro →replaced by 
Donald Young
Jiří Veselý
Stéphane Robert| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 United Kingdom | Jamie Murray |  Brazil | Bruno Soares | 9 | 1 | |
| Raven Klaasen | Rajeev Ram | 30 | 2 | |||
| United Kingdom | Dominic Inglot | Jean-Julien Rojer | 45 | 3 | ||
 Finland | Henri Kontinen |  Australia | John Peers | 51 | 4 |
The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw:
See main article: 2016 Rakuten Japan Open Tennis Championships – Singles.
Nick Kyrgios defeated 
David Goffin, 4−6, 6−3, 7−5See main article: 2016 Rakuten Japan Open Tennis Championships – Doubles.
Marcel Granollers / 
Marcin Matkowski defeated Raven Klaasen / Rajeev Ram, 6–2, 7–6(7–4)
