2012 Rakuten Japan Open Tennis Championships
Date	1–7 October
Edition	39th
Category	ATP World Tour 500
Surface	Hard / outdoor
Location	Tokyo, Japan
Venue	Ariake Coliseum
Champions
Singles
Kei Nishikori
Doubles
Alexander Peya / Bruno Soares
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The 2012 Rakuten Japan Open Tennis Championships was a men's tennis tournament played on outdoor hard courts. It was the 39th edition of the event known this year as the Rakuten Japan Open Tennis Championships, and part of the 500 Series of the 2012 ATP World Tour. It was held at the Ariake Coliseum in Tokyo, Japan, from October 1 till October 7, 2012. Kei Nishikori won the singles title

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
GBR	Andy Murray	3	1
CZE	Tomáš Berdych	6	2
SRB	Janko Tipsarević	9	3
ARG	Juan Mónaco	11	4
ESP	Nicolás Almagro	12	5
CAN	Milos Raonic	15	6
SWI	Stanislas Wawrinka	16	7
JPN	Kei Nishikori	17	8

• ¹ Rankings are based on the rankings of September 24, 2012.^[1]

Other entrants

The following players received wildcards into the singles main draw:

• Tatsuma Ito
• Hiroki Moriya
• Yūichi Sugita

The following players received entry from the qualifying draw:

• Marco Chiudinelli
• Grigor Dimitrov
• Sergiy Stakhovsky
• Dmitry Tursunov

The following player received entry as lucky loser:

• Ivo Karlović

Withdrawals

• Mardy Fish
• Gaël Monfils (right knee injury)

Retirements

• Viktor Troicki (calf muscle injury)

Doubles main-draw entrants

Seeds

Country	Player	Country	Player	Rank1	Seed
IND	Leander Paes	CZE	Radek Štěpánek	14	1
PAK	Aisam-ul-Haq Qureshi	NED	Jean-Julien Rojer	29	2
MEX	Santiago González	USA	Scott Lipsky	54	3
AUT	Alexander Peya	BRA	Bruno Soares	57	4

• Rankings are as of September 24, 2012

Other entrants

The following pairs received wildcards into the doubles main draw:

• Hiroki Moriya / Takao Suzuki
• Yūichi Sugita / Yasutaka Uchiyama

Retirements

• Janko Tipsarević (tonsillitis)

Finals

Singles

Kei Nishikori defeated Milos Raonic, 7–6^(7–5), 3–6, 6–0

Doubles

Alexander Peya / Bruno Soares defeated Leander Paes / Radek Štěpánek, 6–3, 7–6^(7–5)