The 2017 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on outdoor hard courts. It was the 44th edition of the Japan Open, and part of the 500 Series of the 2017 ATP World Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from October 2–8, 2017.
| 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=dfe2e9 | 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:#ededed | Singles | $336,900 | $165,170 | $83,110 | $42,265 | $21,950 | $11,575 | $2,560 | $1,310 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Doubles | $101,440 | $49,660 | $24,910 | $12,785 | $6,610 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Marin Čilić | 5 | 1 | ||
| Dominic Thiem | 7 | 2 | ||
| Milos Raonic | 11 | 3 | ||
| David Goffin | 12 | 4 | ||
| Kevin Anderson | 15 | 5 | ||
| Sam Querrey | 16 | 6 | ||
| Albert Ramos Viñolas | 25 | 7 | ||
| Diego Schwartzman | 29 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry as a special exempt:
The following players received entry from the qualifying draw:
Chung Hyeon →replaced by 
Donald Young
Gaël Monfils →replaced by 
Jiří Veselý
Gilles Müller →replaced by 
Daniil Medvedev| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Romania | Horia Tecău | 19 | 1 | |||
 United Kingdom | Jamie Murray |  Brazil | Bruno Soares | 23 | 2 | |
| Raven Klaasen | Rajeev Ram | 33 | 3 | |||
| Ryan Harrison |  New Zealand | Michael Venus | 40 | 4 |
The following pairs received wildcards into the doubles main draw:
The following pair received entry from the qualifying draw:
See main article: 2017 Rakuten Japan Open Tennis Championships – Singles.
David Goffin defeated Adrian Mannarino, 6–3, 7–5See main article: 2017 Rakuten Japan Open Tennis Championships – Doubles.
Ben McLachlan / Yasutaka Uchiyama defeated Jamie Murray / Bruno Soares, 6–4, 7–6(7–1)
