Doubles
2018 Rakuten Japan Open Tennis Championships
Final
Champions	Ben McLachlan Jan-Lennard Struff
Runners-up	Raven Klaasen Michael Venus
Score	6–4, 7–5
Events
Singles Doubles
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Ben McLachlan and Yasutaka Uchiyama were the defending champions but chose not to participate together. McLachlan played alongside Jan-Lennard Struff and successfully defended the title, defeating Raven Klaasen and Michael Venus in the final, 6–4, 7–5. Uchiyama teamed up with Joe Salisbury, but lost in the semifinals to Klaasen and Venus.

	First round							Quarterfinals							Semifinals							Final
	1	H Kontinen J Peers	6	64	[7]
	Q	F Martin G Simon	3	77	[10]			Q	F Martin G Simon	65	68
		R Haase M Middelkoop	6	6					R Haase M Middelkoop	77	710
		D Medvedev A-u-H Qureshi	4	3												R Haase M Middelkoop	1	4
	4	B McLachlan J-L Struff	77	7											4	B McLachlan J-L Struff	6	6
		J Peralta H Zeballos	64	5				4	B McLachlan J-L Struff	6	6
		H Chung M Ebden	6	6					H Chung M Ebden	4	4
		R Gasquet A Mannarino	4	4																		4	B McLachlan J-L Struff	6	7
		D Inglot F Škugor	77	6																		3	R Klaasen M Venus	4	5
		D Džumhur S González	63	2					D Inglot F Škugor	6	67	[9]
		S Johnson D Schwartzman	5	2				3	R Klaasen M Venus	3	79	[11]
	3	R Klaasen M Venus	7	6											3	R Klaasen M Venus	4	77	[18]
	WC	Y Nishioka K Uesugi	3	65											WC	J Salisbury Y Uchiyama	6	62	[16]
	WC	J Salisbury Y Uchiyama	6	77				WC	J Salisbury Y Uchiyama	77	4	[10]
		D Sharan A Sitak	3	5				2	J Murray B Soares	64	6	[3]
	2	J Murray B Soares	6	7

1. Fabrice Martin / Gilles Simon

	First round							Qualifying competition
	1	Max Mirnyi Philipp Oswald	6	3	[10]
		Fabrice Martin Gilles Simon	3	6	[12]
									Fabrice Martin Gilles Simon	7	6
								2	James Cerretani Nick Kyrgios	5	4
	WC	Yusuke Takahashi Yosuke Watanuki	3	7	[11]
	2	James Cerretani Nick Kyrgios	6	5	[13]

• Main Draw
• Qualifying Draw