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2015 Rakuten Japan Open Tennis Championships
Date	5–11 October
Edition	42nd
Category	ATP World Tour 500
Draw	32S / 16D
Surface	Hard / outdoor
Location	Tokyo, Japan
Champions
Singles
Stan Wawrinka
Doubles
Raven Klaasen / Marcelo Melo
← 2014 · Japan Open · 2016 →

The 2015 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on outdoor hard courts. It was the 42nd edition of the Japan Open, and part of the 500 Series of the 2015 ATP World Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from October 5–11, 2015.

Event	W	F	SF	QF	Round of 16	Round of 32	Q	Q2	Q1
Singles[1]	500	300	180	90	45	0	20	10	0
Doubles[1]					0	—	—	—	—

Event	W	F	SF	QF	Round of 16	Round of 32	Q2	Q1
Singles	$306,200	$138,000	$65,400	$31,555	$16,100	$8,850	$1,000	$550
Doubles	$90,640	$40,810	$19,240	$9,300	$4,780	—	—	—

Country	Player	Rank1	Seed
SUI	Stan Wawrinka	4	1
JPN	Kei Nishikori	6	2
FRA	Gilles Simon	10	3
FRA	Richard Gasquet	11	4
RSA	Kevin Anderson	12	5
CRO	Marin Čilić	14	6
ESP	Feliciano López	17	7
BUL	Grigor Dimitrov	19	8

• ¹ Rankings are as of September 28, 2015.

The following players received wildcards into the singles main draw:

• Tatsuma Ito
• Yoshihito Nishioka
• Yasutaka Uchiyama

The following players received entry from the qualifying draw:

• Matthew Ebden
• Austin Krajicek
• Donald Young
• Mikhail Youzhny

Before the tournament

• Pablo Andújar →replaced by Sam Groth
• Ernests Gulbis →replaced by Marcos Baghdatis
• Gaël Monfils →replaced by Albert Ramos Viñolas

• Sam Groth (foot injury)
• Bernard Tomic (illness)

Country	Player	Country	Player	Rank1	Seed
USA	Bob Bryan	USA	Mike Bryan	2	1
FRA	Pierre-Hugues Herbert	FRA	Nicolas Mahut	18	2
RSA	Raven Klaasen	BRA	Marcelo Melo	30	3
AUT	Alexander Peya	BRA	Bruno Soares	46	4

• Rankings are as of September 28, 2015

The following pairs received wildcards into the doubles main draw:

• Austin Krajicek / Yasutaka Uchiyama
• Toshihide Matsui / Jarkko Nieminen

The following pair received entry from the qualifying draw:

• Steve Johnson / Sam Querrey

The following pair received entry as lucky losers:

• Andre Begemann / Artem Sitak

Before the tournament

• Kevin Anderson (right knee injury)

• Stan Wawrinka defeated Benoît Paire, 6–2, 6–4

• Raven Klaasen / Marcelo Melo defeated Juan Sebastián Cabal / Robert Farah, 7–6^(7–5) , 3–6, [10–7]

• Official website