2012 All Japan Indoor Tennis Championships – Singles

Dominik Meffert was the defending champion but decided not to participate.
Tatsuma Ito won the title, defeating Malek Jaziri 6–7^(5–7), 6–1, 6–2 in the final.

Singles
2012 All Japan Indoor Tennis Championships
Champion	Tatsuma Ito
Runner-up	Malek Jaziri
Final score	6–7^(5–7), 6–1, 6–2

Main article: 2012 All Japan Indoor Tennis Championships

Seeds

1. Go Soeda (Second Round)
2. Malek Jaziri (Final)
3. Tatsuma Ito (Champion)
4. Yuichi Sugita (Quarterfinals)
5. Danai Udomchoke (Second Round)
6. Yang Tsung-hua (Second Round)
7. Benjamin Mitchell (First Round)
8. Harri Heliövaara (Second 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

Finals

	Semifinals							Final
		Hiroki Moriya	4	2
	3	Tatsuma Ito	6	6
								3	Tatsuma Ito	6^5	6	6
								2	Malek Jaziri	7^7	1	2
		Samuel Groth	6^2	3
	2	Malek Jaziri	7^7	6

Top Half

	First Round							Second Round							Quarterfinals							Semifinals
	1	G Soeda	6	6
	Q	P Raja	4	4				1	G Soeda	6^9	1
	WC	Y Uchiyama	5	1					Hiroki Moriya	7^11	6
		Hiroki Moriya	7	6												Hiroki Moriya	6	5	7^7
		S Rieschick	6	6												S Rieschick	4	7	6^5
		A Weintraub	4	4					S Rieschick	6	6
		Z Zhang	1	6	3			6	T-h Yang	2	0
	6	T-h Yang	6	3	6																		Hiroki Moriya	4	2
	3	T Ito	7^7	7																		3	T Ito	6	6
		J Lemke	6^2	5				3	T Ito	3	6	6
		R Klaasen	6^4	7^8	4			Q	M Barton	6	4	0
	Q	M Barton	7^7	6^6	6										3	T Ito	7^7	6^4	6
		Y Bhambri	6	6												Y Bhambri	6^5	7^7	3
		C Niland	1	3					Y Bhambri	3	6	6
	WC	T Niki	5	3				5	D Udomchoke	6	4	2
	5	D Udomchoke	7	6

Bottom Half

	First Round							Second Round							Quarterfinals							Semifinals
	8	H Heliövaara	7	6
	WC	Shota Tagawa	5	4				8	H Heliövaara	4	6	6^5
		S Groth	1	6	7				S Groth	6	4	7^7
	Q	B Klein	6	3	5											S Groth	7^7	7^12
		Y-k Lim	3	4											4	Y Sugita	6^4	6^10
	WC	T Suzuki	6	5^r					Y-k Lim	5	2
		T Chen	6^3	3				4	Y Sugita	7	6
	4	Y Sugita	7^7	6																			S Groth	6^2	3
	7	B Mitchell	7	2	4																	2	M Jaziri	7^7	6
		J Wang	5	6	6				J Wang	6	2	6
		J Millman	6^9	5					K Čapkovič	1	6	3
		K Čapkovič	7^11	7												J Wang	6	4	3
		Michael Look	6	7^7											2	M Jaziri	0	6	6
	Q	Y Chu-huan	4	6^4					M Look	5	5
		D Molchanov	7^9	6^5	0			2	M Jaziri	7	7
	2	M Jaziri	6^7	7^7	6

References

• Main Draw
• Qualifying Draw