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Singles
2012 Rakuten Japan Open Tennis Championships
Final
Champion	Kei Nishikori
Runner-up	Milos Raonic
Score	7–6(7–5), 3–6, 6–0
Details
Draw	32 (4Q / 3WC)
Seeds	8
Events
Singles Doubles
← 2011 · Japan Open · 2013 →

Andy Murray was the defending champion, but lost to Milos Raonic in the semifinals.
Eighth-seeded Kei Nishikori won the title beating Milos Raonic in the final 7–6^(7–5), 3–6, 6–0, and in doing so became the first home grown winner of the title since Toshiro Sakai in 1972.

	Semifinals							Final
	1	Andy Murray	3	77	64
	6	Milos Raonic	6	65	77
								6	Milos Raonic	65	6	0
								8	Kei Nishikori	77	3	6
		Marcos Baghdatis	2	2
	8	Kei Nishikori	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	A Murray	79	6
	LL	I Karlović	67	4				1	A Murray	6	6
		A Ramos	0	2					L Lacko	1	2
		L Lacko	6	6											1	A Murray	6	3	6
		J Chardy	6	7											7	S Wawrinka	2	6	2
	WC	Y Sugita	1	5					J Chardy	61	78	5
	WC	H Moriya	5	6	4			7	S Wawrinka	77	66	7
	7	S Wawrinka	7	4	6																	1	A Murray	3	77	64
	3	J Tipsarević	4	6	6																	6	M Raonic	6	65	77
		G Simon	6	3	1			3	J Tipsarević	6	6
		M Kližan	63	2				Q	M Chiudinelli	4	2
	Q	M Chiudinelli	77	6											3	J Tipsarević	77	2	67
		V Troicki	6	6											6	M Raonic	65	6	79
		R Haase	2	3					V Troicki	0r
		R Štěpánek	4	4				6	M Raonic	3
	6	M Raonic	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	N Almagro	64	65
	WC	T Ito	77	77				WC	T Ito	5	3
	Q	D Tursunov	6	7				Q	D Tursunov	7	6
		B Tomic	4	5											Q	D Tursunov	2	4
	Q	S Stakhovsky	63	5												M Baghdatis	6	6
		M Baghdatis	77	7					M Baghdatis	7	1	6
	Q	G Dimitrov	2	1				4	J Mónaco	5	6	3
	4	J Mónaco	6	6																			M Baghdatis	2	2
	8	K Nishikori	4	6	6																	8	K Nishikori	6	6
		G Soeda	6	2	3			8	K Nishikori	5	6	6
		J Nieminen	2	4				PR	T Robredo	7	1	0
	PR	T Robredo	6	6											8	K Nishikori	7	6
		T Bellucci	5	2											2	T Berdych	5	4
		A Falla	7	6					A Falla	3	5
		B Paire	1	66				2	T Berdych	6	7
	2	T Berdych	6	78

1. Ivo Karlović

	First round							Qualifying competition
	1	Grigor Dimitrov	7	6
		Hiroki Kondo	5	4
								1	Grigor Dimitrov	6	65	6
								6	Vasek Pospisil	4	77	2
		Riccardo Ghedin	63	4
	6	Vasek Pospisil	77	6

	First round							Qualifying competition
	2	Ivo Karlović	6	6
		Yasutaka Uchiyama	4	2
								2	Ivo Karlović	3	78	65
								7	Marco Chiudinelli	6	66	77
	WC	Hiroyasu Ehara	4	3
	7	Marco Chiudinelli	6	6

	First round							Qualifying competition
	3	Sergiy Stakhovsky	4	77	7
		Toshihide Matsui	6	64	5
								3	Sergiy Stakhovsky	4	7	6
								8	Dušan Lajović	6	5	0
	WC	Shuichi Sekiguchi	1	5
	8	Dušan Lajović	6	7

	First round							Qualifying competition
	4	Dmitry Tursunov	6	78
	WC	Kaichi Uchida	4	66
								4	Dmitry Tursunov	6	6
								5	Philipp Petzschner	1	4
		Kento Takeuchi	77	4	3
	5	Philipp Petzschner	64	6	6

• Main draw
• Qualifying draw