2016 Rakuten Japan Open Tennis Championships

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.

Seeds

 * 1 Rankings are as of September 26, 2016.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇯🇵 Taro Daniel
 * 🇯🇵 Yoshihito Nishioka
 * 🇯🇵 Yūichi Sugita

The following player using a protected ranking into the singles main draw:
 * 🇦🇷 Juan Mónaco
 * 🇷🇸 Janko Tipsarević

The following players received entry from the qualifying draw:
 * 🇦🇺 James Duckworth
 * 🇺🇸 Ryan Harrison
 * 🇯🇵 Go Soeda
 * 🇨🇿 Radek Štěpánek

The following player received entry as a lucky loser:
 * 🇺🇸 Donald Young

Withdrawals

 * Before the tournament
 * 🇪🇸 Nicolás Almagro →replaced by 🇺🇸 Donald Young
 * Borna Ćorić →replaced by 🇨🇿 Jiří Veselý
 * Stan Wawrinka →replaced by 🇫🇷 Stéphane Robert


 * During the tournament
 * 🇨🇿 Radek Štěpánek

Retirements

 * 🇪🇸 Feliciano López
 * 🇯🇵 Kei Nishikori

Seeds

 * Rankings are as of September 26, 2016

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇯🇵 Taro Daniel / 🇯🇵 Yasutaka Uchiyama
 * 🇯🇵 Akira Santillan / 🇯🇵 Yosuke Watanuki

The following pair received entry from the qualifying draw:
 * 🇺🇸 Nicholas Monroe / 🇳🇿 Artem Sitak

Withdrawals

 * During the tournament
 * 🇨🇿 Radek Štěpánek

Retirements

 * 🇪🇸 Feliciano López

Singles

 * 🇦🇺 Nick Kyrgios defeated 🇧🇪 David Goffin, 4−6, 6−3, 7−5

Doubles

 * 🇪🇸 Marcel Granollers / 🇵🇱 Marcin Matkowski defeated Raven Klaasen / 🇺🇸 Rajeev Ram, 6–2, 7–6(7–4)