Men's singles
1989 Suntory Japan Open Tennis Championships
Final
Champion	Stefan Edberg
Runner-up	Ivan Lendl
Score	6–3, 2–6, 6–4
Details
Draw	56 (7 Q / 5 WC )
Seeds	16
Events
Singles men women Doubles men women
← 1988 · Japan Open · 1990 →

John McEnroe was the defending champion but lost in the semifinals to Stefan Edberg.

Edberg won in the final 6–3, 2–6, 6–4 against Ivan Lendl.

The top eight seeds received a bye to the second round.

	Semifinals							Final
	1	Ivan Lendl	6	6
		Richard Matuszewski	2	2
								1	Ivan Lendl	3	6	4
								2	Stefan Edberg	6	2	6
	3	John McEnroe	4	3
	2	Stefan Edberg	6	6

	First round							Second round							Third round							Quarterfinals
								1	I Lendl	7	6
		P Chamberlin	6	7	7				P Chamberlin	6	3
	SE	R Van't Hof	7	6	5										1	I Lendl	6	6
		D Pate	7	2	3										Q	B Scanlon	2	4
	Q	B Scanlon	6	6	6			Q	B Scanlon	2
		G Connell	6	6	5			16	P Cash	4r
	16	P Cash	4	7	7																	1	I Lendl	6	6
	10	D Goldie	6	2	1																		N Pereira	2	2
		J Pugh	3	6	6				J Pugh	4	6
		M Davis	3	6	4			Q	G Van Emburgh	6	7
	Q	G Van Emburgh	6	3	6										Q	G Van Emburgh	7	3	1
		N Pereira	7	7												N Pereira	5	6	6
		R Fromberg	6	6					N Pereira	6	6
								7	A Gómez	4	1

	First round							Second round							Third round							Quarterfinals
								4	Y Noah	4	5
		J Rive	2	4					G Layendecker	6	7
		G Layendecker	6	6												G Layendecker	4	6	4
		J Stoltenberg	6	3	7											J Stoltenberg	6	3	6
	Q	S Guy	4	6	6				J Stoltenberg	5	6	7
	Q	T Nydahl	4	3				13	J Fitzgerald	7	2	5
	13	J Fitzgerald	6	6																			J Stoltenberg	6	4	6
	12	J Berger	4	6																			R Matuszewski	4	6	7
		B Dyke	6	7					B Dyke	6	4	6
		K Evernden	6	6					K Evernden	4	6	7
	WC	S Shiraishi	1	4												K Evernden	4	7	2
		R Matuszewski	6	6												R Matuszewski	6	6	6
		T Svantesson	4	3					R Matuszewski	7	1	7
								6	K Curren	6	6	6

	First round							Second round							Third round							Quarterfinals
								5	B Gilbert	6	6
	WC	T Tsuchihashi	6	7				WC	T Tsuchihashi	1	3
		R Smith	2	6											5	B Gilbert	6	6
	Q	J Grabb	7	4	6										11	A Järryd	0	2
	WC	T Fukui	5	6	0			Q	J Grabb	4	6	3
	WC	S Ota	2	1				11	A Järryd	6	2	6
	11	A Järryd	6	6																		5	B Gilbert	6	4	1
	14	W Masur	6	7																		3	J McEnroe	2	6	6
	Q	A Castle	3	6				14	W Masur	6	4	6
		J-P Fleurian	1	4					R Krishnan	2	6	3
		R Krishnan	6	6											14	W Masur	2	0
		B Drewett	7	3	7										3	J McEnroe	6	6
		M Anger	5	6	6				B Drewett	2	2
								3	J McEnroe	6	6

	First round							Second round							Third round							Quarterfinals
								8	M Pernfors	3	2
	WC	H Nakano	4	1					S Davis	6	6
		S Davis	6	6												S Davis	6	7	6
		O Rahnasto	6	6	5										9	A Mansdorf	7	6	3
		C Saceanu	7	3	7				C Saceanu	4	4
		J Carlsson	2	6	3			9	A Mansdorf	6	6
	9	A Mansdorf	6	3	6																		S Davis	4	2
	15	R Seguso	3	7	6																	2	S Edberg	6	6
	Q	K Flach	6	6	4			15	R Seguso	3	3
		G Michibata	5	2					M Šrejber	6	6
		M Šrejber	7	6												M Šrejber	4	4
		L Shiras	6	3											2	S Edberg	6	6
		Z Ali	7	6					Z Ali	2	2
								2	S Edberg	6	6

• 1989 Suntory Japan Open Tennis Championships draw