2013 Rakuten Japan Open Tennis Championships

The 2013 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on outdoor hard courts. It was the 40th edition of the event known this year as the Rakuten Japan Open Tennis Championships, and part of the 500 Series of the 2013 ATP World Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from September 30 till October 6, 2013. First-seeded Juan Martín del Potro won the singles title.

Seeds

 * 1 Rankings are as of September 23, 2013.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇦🇷 Juan Martín del Potro
 * 🇯🇵 Tatsuma Ito
 * 🇯🇵 Go Soeda
 * 🇯🇵 Yūichi Sugita

The following players received entry from the qualifying draw:
 * 🇩🇪 Benjamin Becker
 * Marco Chiudinelli
 * 🇺🇸 Ryan Harrison
 * 🇫🇷 Édouard Roger-Vasselin

The following players received entry as lucky losers:
 * 🇸🇰 Lukáš Lacko
 * 🇵🇱 Michał Przysiężny

Withdrawals

 * Before the tournament
 * 🇫🇷 Michaël Llodra (back injury)
 * 🇬🇧 Andy Murray (back surgery)
 * 🇫🇷 Gilles Simon (groin injury)

Seeds

 * Rankings are as of September 23, 2013

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇯🇵 Tatsuma Ito / 🇯🇵 Go Soeda
 * 🇯🇵 Kei Nishikori / 🇯🇵 Yasutaka Uchiyama

The following pair received entry as alternates:
 * 🇩🇪 Andre Begemann / 🇩🇪 Martin Emmrich

Withdrawals

 * Before the tournament
 * 🇫🇷 Michaël Llodra (back injury)

Singles

 * 🇦🇷 Juan Martín del Potro defeated 🇨🇦 Milos Raonic, 7–6(7–5), 7–5

Doubles

 * 🇮🇳 Rohan Bopanna / 🇫🇷 Édouard Roger-Vasselin defeated 🇬🇧 Jamie Murray / 🇦🇺 John Peers, 7–6(7–5), 6–4