Singles
2018 Kobe Challenger
Champion	Tatsuma Ito
Runner-up	Yosuke Watanuki
Score	3–6, 7–5, 6–3

Stéphane Robert was the defending champion but chose not to defend his title.

Tatsuma Ito won the title after defeating Yosuke Watanuki 3–6, 7–5, 6–3 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1	Yoshihito Nishioka	0	6	5
	7	Yosuke Watanuki	6	4	7
								7	Yosuke Watanuki	6	5	3
								2	Tatsuma Ito	3	7	6
	6	Yasutaka Uchiyama	6	0	4
	2	Tatsuma Ito	4	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	Y Nishioka	7	6
		M Echargui	5	1				1	Y Nishioka	6	77
	Q	A Vukic	6	6				Q	A Vukic	2	62
	Q	C Sinclair	1	1											1	Y Nishioka	6	3	6
		A Santillan	6	78											8	S-w Kwon	1	6	4
		Makoto Ochi	3	66					A Santillan	2	7	63
		Renta Tokuda	3	6	1			8	S-w Kwon	6	5	77
	8	S-w Kwon	6	1	6																	1	Y Nishioka	0	6	5
	4	G Soeda	6	6																		7	Yo Watanuki	6	4	7
	WC	K Uesugi	3	1				4	G Soeda	6	7
	WC	S Hazawa	3	6	3			Q	A Harris	3	5
	Q	A Harris	6	3	6										4	G Soeda	4	4
		G Oliveira	6	6											7	Yo Watanuki	6	6
		E Ruusuvuori	3	4					G Oliveira	5	0
		Z Li	4r					7	Yo Watanuki	7	6
	7	Yo Watanuki	4

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	Y Uchiyama	3	6	6
		Shintaro Imai	6	3	2			6	Y Uchiyama	77	6
	Q	T-l Wu	6	6				Q	T-l Wu	60	3
	WC	Hiroyasu Ehara	3	2											6	Y Uchiyama	6	6
		J Samper Montaña	6	6											3	H Moriya	3	2
	WC	Shuichi Sekiguchi	4	1					J Samper Montaña	6	5	3
		Kim Cheong-eui	0	60				3	H Moriya	3	7	6
	3	H Moriya	6	77																		6	Y Uchiyama	6	0	4
	LL	NH Lý	64	711	6																	2	T Ito	4	6	6
		J-s Nam	77	69	2			LL	NH Lý	4	2
		Y-s Chung	77	77					Y-s Chung	6	6
		J Sels	63	63												Y-s Chung	2	3
		Y Shimizu	6	7											2	T Ito	6	6
		Ze Zhang	1	5					Y Shimizu	66	1
		D Wu	4	3				2	T Ito	78	6
	2	T Ito	6	6

References

• Main Draw
• Qualifying Draw