Singles
2018 Rakuten Japan Open Tennis Championships
Champion	Daniil Medvedev
Runner-up	Kei Nishikori
Score	6–2, 6–4
Draw	32 (4Q / 3WC)
Seeds	8

David Goffin was the defending champion, but withdrew before the competition began.

Daniil Medvedev won the title, defeating Kei Nishikori in the final, 6–2, 6–4.

Seeds

Draw

Finals

	Semifinals							Final
		Denis Shapovalov	3	3
	Q	Daniil Medvedev	6	6
								Q	Daniil Medvedev	6	6
								3	Kei Nishikori	2	4
	3	Kei Nishikori	77	6
	8	Richard Gasquet	62	1

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	M Čilić	6	4	61
		J-L Struff	3	6	77				J-L Struff	77	62	6
		J Chardy	4	6	6				J Chardy	63	77	4
		D Džumhur	6	3	3											J-L Struff	6	67	4
		S Wawrinka	6	6												D Shapovalov	4	79	6
	SE	T Fritz	3	4					S Wawrinka	6	1	4
		D Shapovalov	6	3	6				D Shapovalov	4	6	6
	7	H Chung	3	6	2																		D Shapovalov	3	3
	4	D Schwartzman	4	4																		Q	D Medvedev	6	6
	Q	D Medvedev	6	6				Q	D Medvedev	6	6
	Q	M Kližan	6	77				Q	M Kližan	4	3
		S Johnson	4	64											Q	D Medvedev	77	6
	Q	Yo Watanuki	67	6	6										6	M Raonic	64	3
		R Haase	79	4	1			Q	Yo Watanuki	3	62
		A Mannarino	3	4				6	M Raonic	6	77
	6	M Raonic	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	S Tsitsipas	6	6
	WC	T Daniel	1	3				5	S Tsitsipas	6	5	6
		G Simon	77	65	2				A de Minaur	3	7	1
		A de Minaur	61	77	6										5	S Tsitsipas	3	3
		B Paire	6	77											3	K Nishikori	6	6
		N Jarry	4	61					B Paire	3	5
	WC	Y Sugita	4	1				3	K Nishikori	6	7
	3	K Nishikori	6	6																		3	K Nishikori	77	6
	8	R Gasquet	710	6																		8	R Gasquet	62	1
	Q	D Kudla	68	3				8	R Gasquet	77	77
		N Kyrgios	7	77					N Kyrgios	64	61
	WC	Y Nishioka	5	63											8	R Gasquet	78	77
		M Marterer	5	4											2	K Anderson	66	64
		F Tiafoe	7	6					F Tiafoe	3	6	2
		M Ebden	6	61	2			2	K Anderson	6	3	6
	2	K Anderson	4	77	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Daniil Medvedev	6	6
	Alt	Hiroki Moriya	3	3
								1	Daniil Medvedev	64	6	6
								PR	Egor Gerasimov	77	3	3
	PR	Egor Gerasimov	6	6
	5	Marius Copil	4	3

Second qualifier

	First round							Qualifying competition
	2	Martin Kližan	6	6
		Prajnesh Gunneswaran	4	2
								2	Martin Kližan	6	6
								6	Bradley Klahn	3	4
		Ruben Bemelmans	6	3	64
	6	Bradley Klahn	2	6	77

Third qualifier

	First round							Qualifying competition
	3	Denis Kudla	6	3	6
		Horacio Zeballos	2	6	4
								3	Denis Kudla	6	1	6
								WC	Yasutaka Uchiyama	3	6	3
	WC	Yasutaka Uchiyama	6	6
	7	Hubert Hurkacz	2	2

Fourth qualifier

	First round							Qualifying competition
	4	Mackenzie McDonald	4	6	3
	WC	Tatsuma Ito	6	1	6
								WC	Tatsuma Ito	2	4
								WC	Yosuke Watanuki	6	6
	WC	Yosuke Watanuki	6	6
	8	Tim Smyczek	4	2

External links

• Main draw
• Qualifying draw