2017 Japan Women's Open – Singles

Singles
2017 Japan Women's Open
Champion	Zarina Diyas
Runner-up	Miyu Kato
Score	6–2, 7–5

Christina McHale was the defending champion, but lost in the semifinals to Zarina Diyas.

Qualifier Diyas went on to win her first WTA title, defeating another qualifier Miyu Kato in the final, 6–2, 7–5.

Former world no. 4 Kimiko Date played her last professional match at this tournament, losing in straight sets to Aleksandra Krunić in the first round.

	Semifinals							Final
	Q	Jana Fett	6	61	4
	Q	Miyu Kato	4	77	6
								Q	Miyu Kato	2	5
								Q	Zarina Diyas	6	7
		Christina McHale	4	6	3
	Q	Zarina Diyas	6	0	6

	First round							Second round							Quarterfinals							Semifinals
	1/WC	K Mladenovic	3	4
	Q	J Fett	6	6				Q	J Fett	6	6
		A Sasnovich	3	0r					J Čepelová	0	3
		J Čepelová	6	1											Q	J Fett	6	4	6
		S-w Hsieh	5	2												Q Wang	3	6	3
		Q Wang	7	6					Q Wang	6	6
		K Nara	6	6					K Nara	2	3
	6	N Osaka	3	0																		Q	J Fett	6	61	4
	4/WC	Kr Plíšková	7	7																		Q	M Kato	4	77	6
		K-c Chang	5	5				4/WC	Kr Plíšková	5	3
	Q	M Kato	6	6				Q	M Kato	7	6
		N Hibino	3	4											Q	M Kato	6	6
		A Krunić	6	6												A Krunić	1	3
	WC	K Date	0	0					A Krunić	6	6
		M Brengle	7	3	4			7	A Riske	3	4
	7	A Riske	5	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	S Stosur	6	5	1
		S Sorribes Tormo	3	7	6				S Sorribes Tormo	1	1
		C McHale	6	6					C McHale	6	6
	Q	D Kovinić	2	4												C McHale	6	6
		R Ozaki	1	5											3	E Mertens	4	1
		M Linette	6	7					M Linette	1	5
		E Rodina	66	1				3	E Mertens	6	7
	3	E Mertens	78	6																			C McHale	4	6	3
	8	Y Putintseva	6	4	6																	Q	Z Diyas	6	0	6
		Y Duan	4	6	4			8	Y Putintseva	6	2
	PR	M Eguchi	5	2					X Han	2	0r
		X Han	7	6											8	Y Putintseva	6	1	3
	Q	Z Diyas	3	6	6										Q	Z Diyas	4	6	6
		M Doi	6	1	1			Q	Z Diyas	6	6
		R Hogenkamp	3	3				2	S Zhang	4	2
	2	S Zhang	6	6

	First round							Second round							Qualifying competition
	1	Danka Kovinić	3	6	6
		Jennifer Elie	6	4	3
								1	Danka Kovinić	2	6	6
								Alt	Erika Sema	6	3	2
	WC	Moyuka Uchijima	6	4	2
	Alt	Erika Sema	3	6	6
															1	Danka Kovinić	6	3	6
																Miharu Imanishi	3	6	2
		İpek Soylu	2	1
		Miharu Imanishi	6	6
									Miharu Imanishi	2	6	6
									Lizette Cabrera	6	4	0
		Lizette Cabrera	6	4	6
	7	Arantxa Rus	2	6	3

	First round							Second round							Qualifying competition
	2	Zarina Diyas	6	6
		Danielle Collins	3	2
								2	Zarina Diyas	6	6
									Giulia Gatto-Monticone	3	2
		Ayano Shimizu	2	4
		Giulia Gatto-Monticone	6	6
															2	Zarina Diyas	1	77	6
																Luksika Kumkhum	6	64	4
		Mayo Hibi	2	6	4
		Luksika Kumkhum	6	3	6
									Luksika Kumkhum	6	6
								6	Jang Su-jeong	4	4
	WC	Himari Satō	1	2
	6	Jang Su-jeong	6	6

	First round							Second round							Qualifying competition
	3	Kristie Ahn	61	6	4
		Miyu Kato	77	4	6
									Miyu Kato	6	6
									Başak Eraydın	3	0
		Başak Eraydın	4	77	6
		Riko Sawayanagi	6	64	3
																Miyu Kato	6	2	77
																Magdalena Fręch	3	6	63
		Rebecca Peterson	6	5	2
		Magdalena Fręch	3	7	6
									Magdalena Fręch	4	77	6
								5	Arina Rodionova	6	63	1
	WC	Mari Osaka	6	4	4
	5	Arina Rodionova	4	6	6

	First round							Second round							Qualifying competition
	4	Jana Fett	6	6
		Eri Hozumi	2	2
								4	Jana Fett	6	4	6
									Karolína Muchová	1	6	4
		Hiroko Kuwata	4	2
		Karolína Muchová	6	6
															4	Jana Fett	6	6
																Lesley Kerkhove	4	0
		Junri Namigata	2	1
		Lesley Kerkhove	6	6
									Lesley Kerkhove	6	7
								8	Quirine Lemoine	3	5
		Peangtarn Plipuech	1	5
	8	Quirine Lemoine	6	7

• Main Draw
• Qualifying Draw