| Tokyo | Round | Result | H | A | 
		
			| 13.09. |  | Hozumi E. - Yamamoto H. | Q-1R | 6-2, 6-2 | 1.06 | 6.97 | 
		
			| Noto ITF | Round | Result | H | A | 
		
			| 01.09. |  | Okamura K. - Yamamoto H. | Q-R16 | 7-6, 6-4 | 1.32 | 3.15 | 
		
			| 30.08. |  | Yamamoto H. - Suzuki R. | Q-1R | 6-0, 6-0 |  |  | 
		
			| Tsukuba ITF | Round | Result | H | A | 
		
			| 24.08. |  | Tanasugarn T. - Yamamoto H. | Q-1R | 6-0, 6-2 | 1.28 | 3.50 | 
		
			| Bangkok 8 ITF | Round | Result | H | A | 
		
			| 09.07. |  | Sharipova S. - Yamamoto H. | R16 | 6-4, 6-3 |  |  | 
		
			| 08.07. |  | Yamamoto H. - Silakul C. | 1R | 6-1, 7-5 | 1.03 | 10.00 | 
		
			| 06.07. |  | Yamamoto H. - Plipuech P. | Q-R16 | 6-2, 6-2 |  |  | 
		
			| 05.07. |  | Yamamoto H. - Thaipakdee J. | Q-1R | 6-0, 6-3 |  |  | 
		
			| Bangkok 7 ITF | Round | Result | H | A | 
		
			| 01.07. |  | Wongteanchai V. - Yamamoto H. | 1R | 6-3, 6-0 | 1.12 | 5.50 | 
		
			| 29.06. |  | Yamamoto H. - Jandakate C. | Q-R16 | 6-0, 6-3 |  |  | 
		
			| 28.06. |  | Yamamoto H. - Chua An Ping A. | Q-1R | 6-1, 6-4 |  |  | 
		
			| Bangkok 5 ITF | Round | Result | H | A | 
		
			| 24.06. |  | Westbury K. - Yamamoto H. | 1R | 3-6, 6-4, 6-1 | 1.43 | 2.56 | 
		
			| Kashiwa ITF | Round | Result | H | A | 
		
			| 10.06. |  | Nishimura K. - Yamamoto H. | 1R | 1-6, 6-1, 6-4 | 1.57 | 2.25 | 
		
			| Tokyo ITF | Round | Result | H | A | 
		
			| 01.06. |  | Takayama C. - Yamamoto H. | Q-2R | 7-63, 6-3 |  |  | 
		
			| Karuizawa ITF | Round | Result | H | A | 
		
			| 22.05. |  | Murray S. - Yamamoto H. | 1R | 7-63, 6-2 | 1.12 | 5.75 | 
		
			| 19.05. |  | Yamamoto H. - Minokoshi M. | Q-R16 | 6-2, 6-3 | 3.25 | 1.29 | 
		
			| 18.05. |  | Yamamoto H. - Sano H. | Q-1R | 6-4, 6-1 | 1.00 | 26.00 | 
		
			| Gifu ITF | Round | Result | H | A | 
		
			| 27.04. |  | Lertpitaksinchai N. - Yamamoto H. | Q-R16 | 6-3, 6-3 |  |  | 
		
			| 27.04. |  | Yamamoto H. - Ayukawa M. | Q-1R | 7-65, 7-5 | 3.75 | 1.25 | 
		
			| Nishi-Tama ITF | Round | Result | H | A | 
		
			| 22.03. |  | Hasegawa M. - Yamamoto H. | Q-1R | 6-1, 7-64 |  |  | 
		
			| Kofu ITF | Round | Result | H | A | 
		
			| 15.03. |  | Yamamoto M. - Yamamoto H. | Q-1R | 7-65, 6-4 |  |  | 
		
			| Antalya 5 ITF | Round | Result | H | A | 
		
			| 25.02. |  | Mircic T. - Yamamoto H. | 1R | 6-2, 6-3 | 1.16 | 4.50 | 
		
			| Antalya 4 ITF | Round | Result | H | A | 
		
			| 18.02. |  | Nunome C. - Yamamoto H. | 1R | 2-6, 7-5, 7-5 | 3.25 | 1.33 | 
		
			| Antalya 3 ITF | Round | Result | H | A | 
		
			| 11.02. |  | Stamatova J. - Yamamoto H. | 1R | 6-2, 6-2 | 1.72 | 2.00 | 
		
			| 10.02. |  | Yamamoto H. - Nekhoroshikh V. | Q-R16 | 6-0, 6-1 |  |  | 
		
			| 09.02. |  | Yamamoto H. - Natali M. | Q-2R | 6-4, 6-4 |  |  | 
		
			| Tinajo 4 ITF | Round | Result | H | A | 
		
			| 02.02. |  | Drew J. - Yamamoto H. | Q-R16 | 6-1, 7-5 |  |  | 
		
			| Tinajo 3 ITF | Round | Result | H | A | 
		
			| 30.01. |  | Pous-Tio L. - Yamamoto H. | R16 | 6-1, 6-4 | 1.07 | 7.50 | 
		
			| 28.01. |  | Yamamoto H. - Caciotti M. | 1R | 6-1, 6-1 | 1.10 | 6.50 | 
		
			| 27.01. |  | Yamamoto H. - Sneed O. | Q-R16 | 7-5, 5-7, 6-4 |  |  | 
		
			| 25.01. |  | Yamamoto H. - Perdomo Cabrera E. | Q-2R | 6-0, 6-0 |  |  | 
		
			| Tinajo 2 ITF | Round | Result | H | A | 
		
			| 20.01. |  | Distelmans S. - Yamamoto H. | Q-R16 | 6-1, 6-2 |  |  | 
		
			| 19.01. |  | Yamamoto H. - Sugihara R. | Q-2R | 6-1, 6-0 |  |  |