2018 Shimadzu All Japan Indoor Tennis Championships – Doubles

Sanchai and Sonchat Ratiwatana were the defending champions but lost in the first round to Gong Maoxin and Hsieh Cheng-peng.

Doubles
2018 Shimadzu All Japan Indoor Tennis Championships
Champions	Luke Saville Jordan Thompson
Runners-up	Go Soeda Yasutaka Uchiyama
Score	6–3, 5–7, [10–6]

Main article: 2018 Shimadzu All Japan Indoor Tennis Championships

Luke Saville and Jordan Thompson won the title after defeating Go Soeda and Yasutaka Uchiyama 6–3, 5–7, [10–6] in the final.

Seeds

1. Sanchai Ratiwatana / Sonchat Ratiwatana (first round)
2. Jeevan Nedunchezhiyan / Christopher Rungkat (first round)
3. Luke Saville / Jordan Thompson (champions)
4. Peng Hsien-yin / Andreas Siljeström (first round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

	First round							Quarterfinals							Semifinals							Final
	1	Sa Ratiwatana So Ratiwatana	66	4
		M Gong C-p Hsieh	78	6					M Gong C-p Hsieh	63	6	[10]
		T Kamke T Pütz	6	2	[10]				T Kamke T Pütz	77	2	[3]
		M Purcell A Whittington	4	6	[6]											M Gong C-p Hsieh	78	68	[3]
	3	L Saville J Thompson	77	6											3	L Saville J Thompson	66	710	[10]
	WC	T Ito K Uesugi	63	3				3	L Saville J Thompson	77	7
		T Matsui C-h Yi	77	4	[11]				B Klein L Margaroli	61	5
		B Klein L Margaroli	65	6	[13]																	3	L Saville J Thompson	6	5	[10]
		T Altuna H Hurkacz	6	2	[10]																		G Soeda Y Uchiyama	3	7	[6]
	WC	Sora Fukuda Y Shimizu	1	6	[8]				T Altuna H Hurkacz	2	1
		G Soeda Y Uchiyama	6	6					G Soeda Y Uchiyama	6	6
	4	H-y Peng A Siljeström	4	4												G Soeda Y Uchiyama	6	78
	WC	Daiki Hayashi Kosuke Shibano	5	1												S Balaji P Gunneswaran	4	66
		S Balaji P Gunneswaran	7	6					S Balaji P Gunneswaran	6	6
		Z Li S Robert	6	6					Z Li S Robert	4	4
	2	J Nedunchezhiyan C Rungkat	3	1

References

• Main Draw