Doubles
2018 Japan Women's Open
Champions	Eri Hozumi Zhang Shuai
Runners-up	Miyu Kato Makoto Ninomiya
Score	6–2, 6–4

Shuko Aoyama and Yang Zhaoxuan were the defending champions, but Yang chose not to participate. Aoyama played alongside Duan Yingying, but lost in the semifinals to Eri Hozumi and Zhang Shuai.

Hozumi and Zhang went on to win the title, defeating Miyu Kato and Makoto Ninomiya in the final, 6–2, 6–4.

Seeds

Draw

Draw

	First round							Quarterfinals							Semifinals							Final
	1	M Kato M Ninomiya	64	6	[10]
		E Perez Ar Rodionova	77	3	[6]			1	M Kato M Ninomiya	5	6	[10]
		Z Diyas S Zheng	6	6					Z Diyas S Zheng	7	2	[5]
		N Hibino O Kalashnikova	3	4											1	M Kato M Ninomiya	77	6
	4	V Golubic J Larsson	6	4	[6]											V Savinykh S Sorribes Tormo	61	4
		V Savinykh S Sorribes Tormo	3	6	[10]				V Savinykh S Sorribes Tormo	6	6
		M Kobori A Shimizu	6	5	[10]			WC	M Imanishi A Rosolska	3	3
	WC	M Imanishi A Rosolska	3	7	[12]																	1	M Kato M Ninomiya	2	4
		P Hercog T Zidanšek	3	2																		2	E Hozumi S Zhang	6	6
		H Dart P Hon	6	6					H Dart P Hon
	WC	H Kuwata C Muramatsu	2	4				3	S Aoyama Y Duan	w/o
	3	S Aoyama Y Duan	6	6											3	S Aoyama Y Duan	1	4
		D Kovinić S Soler Espinosa	3	2											2	E Hozumi S Zhang	6	6
		M Adamczak J Moore	6	6					M Adamczak J Moore	4	2
		X Han L Kumkhum	3	2				2	E Hozumi S Zhang	6	6
	2	E Hozumi S Zhang	6	6

References

• Main Draw