| Nonthaburi ITF | Round | Result | H | A | 
		
			| 01.01. |  | Yao X. - Yamaguchi M. | 1R | 7-5, 7-5 | 2.28 | 1.51 | 
		
			| Dubai ITF | Round | Result | H | A | 
		
			| 06.12. |  | Kudermetova P. - Yamaguchi M. | QF | 0-6, 6-1, 6-3 | 1.21 | 3.86 | 
		
			| 05.12. |  | Yamaguchi M. - Zhao C. | R16 | 6-1, 6-2 | 1.66 | 2.10 | 
		
			| 03.12. |  | Yamaguchi M. - Tikhonova A. | 1R | 2-6, 6-3, 6-2 | 1.99 | 1.73 | 
		
			| 02.12. |  | Yamaguchi M. - Kudashova D. | Q-R16 | 6-4, 4-6, 6-4 | 1.64 | 2.09 | 
		
			| 01.12. |  | Yamaguchi M. - Szabo B. | Q-1R | 6-1, 6-1 | 1.14 | 4.69 | 
		
			| Yokohama ITF | Round | Result | H | A | 
		
			| 27.11. |  | Ito A. - Yamaguchi M. | 1R | 6-3, 6-2 | 1.31 | 3.19 | 
		
			| Takasaki ITF | Round | Result | H | A | 
		
			| 22.11. |  | Wei S. - Yamaguchi M. | R16 | 6-4, 2-6, 6-2 | 1.42 | 2.64 | 
		
			| 19.11. |  | Yamaguchi M. - Inoue H. | 1R | 6-1, 6-4 | 2.17 | 1.61 | 
		
			| Hamamatsu ITF | Round | Result | H | A | 
		
			| 10.11. |  | Yamaguchi M. - Ito A. | F | 4-6, 5-3 | 3.18 | 1.30 | 
		
			| 09.11. |  | Yamaguchi M. - Shimizu A. | SF | 4-6, 6-4, 6-0 | 1.97 | 1.70 | 
		
			| 08.11. |  | Yamaguchi M. - Nakashima R. | QF | 6-1, 6-1 | 1.23 | 3.68 | 
		
			| 07.11. |  | Yamaguchi M. - Akita S. | R16 | 6-4, 6-3 | 1.27 | 3.39 | 
		
			| 06.11. |  | Yamaguchi M. - Negishi Y. | 1R | 6-0, 6-1 | 1.03 | 9.57 | 
		
			| Hong Kong WTA | Round | Result | H | A | 
		
			| 29.10. |  | Kenin S. - Yamaguchi M. | 1R | 6-4, 6-4 | 1.07 | 8.20 | 
		
			| 27.10. |  | Yamaguchi M. - Lu J. | Q-R16 | 6-1, 7-67 | 2.00 | 1.75 | 
		
			| 26.10. |  | Yamaguchi M. - Guo M. | Q-1R | 7-5, 6-4 | 1.24 | 3.88 | 
		
			| Tokyo | Round | Result | H | A | 
		
			| 21.10. |  | Andreescu B. - Yamaguchi M. | 1R | 7-5, 6-3 | 1.08 | 8.09 | 
		
			| 20.10. |  | Yamaguchi M. - Shimizu E. | Q-R16 | 7-5, 6-1 | 2.01 | 1.74 | 
		
			| 19.10. |  | Yamaguchi M. - Kaji H. | Q-1R | 6-3, 6-3 | 2.62 | 1.46 | 
		
			| Nanao ITF | Round | Result | H | A | 
		
			| 27.09. |  | Ito A. - Yamaguchi M. | QF | 6-2, 6-4 | 1.31 | 2.96 | 
		
			| 26.09. |  | Yamaguchi M. - Kozaki F. | R16 | 6-2, 6-3 | 1.31 | 3.18 | 
		
			| 24.09. |  | Yamaguchi M. - Yuan C. | 1R | 6-3, 6-4 | 1.14 | 4.92 | 
		
			| Seoul WTA | Round | Result | H | A | 
		
			| 14.09. |  | Kudermetova P. - Yamaguchi M. | Q-1R | 1-6, 6-0, 6-0 | 1.19 | 4.50 | 
		
			| Incheon ITF | Round | Result | H | A | 
		
			| 05.09. |  | Prozorova T. - Yamaguchi M. | R16 | 6-4, 6-3 | 1.18 | 4.34 | 
		
			| 04.09. |  | Yamaguchi M. - Stevanovic N. | 1R | 6-1, 6-2 | 2.30 | 1.54 | 
		
			| 02.09. |  | Yamaguchi M. - Yang Y. | Q-R16 | 6-4, 6-2 | 1.72 | 1.96 | 
		
			| 01.09. |  | Yamaguchi M. - Im H. | Q-1R | 6-2, 6-2 | 1.11 | 5.56 | 
		
			| Jinan ITF | Round | Result | H | A | 
		
			| 29.08. |  | Inoue H. - Yamaguchi M. | R16 | 6-1, 6-2 | 1.22 | 3.83 | 
		
			| 27.08. |  | Yamaguchi M. - Jialin T. | 1R | 6-4, 6-3 | 1.17 | 4.37 | 
		
			| Kunshan ITF | Round | Result | H | A | 
		
			| 22.08. |  | Feng S. - Yamaguchi M. | R16 | 4-6, 6-0, 6-2 | 2.30 | 1.54 | 
		
			| 20.08. |  | Yamaguchi M. - Yuan C. | 1R | 6-3, 6-3 | 1.30 | 3.23 | 
		
			| Hong Kong ITF | Round | Result | H | A | 
		
			| 02.07. |  | Inoue H. - Yamaguchi M. | 1R | 6-2, 6-2 | 1.36 | 2.88 | 
		
			| Taipei 3 ITF | Round | Result | H | A | 
		
			| 28.06. |  | Shimizu A. - Yamaguchi M. | QF | 6-4, 6-1 | 1.72 | 1.98 | 
		
			| 27.06. |  | Yamaguchi M. - Arakawa H. | R16 | 7-63, 2-6, 6-4 | 1.85 | 1.83 | 
		
			| 26.06. |  | Yamaguchi M. - Naklo T. | 1R | 6-4, 1-6, 6-4 | 2.01 | 1.71 | 
		
			| Taipei 2 ITF | Round | Result | H | A | 
		
			| 20.06. |  | Okamura K. - Yamaguchi M. | R16 | 4-6, 6-3, 6-1 | 1.77 | 1.93 | 
		
			| 18.06. |  | Yamaguchi M. - Lee P. | 1R | 6-4, 7-5 | 1.44 | 2.58 | 
		
			| Goyang ITF | Round | Result | H | A | 
		
			| 20.05. |  | Matsuda M. - Yamaguchi M. | Q-R16 | 7-61, 6-0 | 1.83 | 1.82 | 
		
			| 19.05. |  | Yamaguchi M. - Wi H. | Q-1R | 6-4, 7-63 | 1.11 | 5.20 | 
		
			| Kurume ITF | Round | Result | H | A | 
		
			| 18.05. |  | Bektas E. - Yamaguchi M. | SF | 6-3, 7-63 | 1.12 | 5.25 | 
		
			| 17.05. |  | Yamaguchi M. - Zhao C. | QF | 6-4, 6-4 | 2.75 | 1.39 | 
		
			| 16.05. |  | Yamaguchi M. - Hewitt D. | R16 | 6-1, 4-2 | 1.85 | 1.81 | 
		
			| 15.05. |  | Yamaguchi M. - Kaji H. | 1R | 6-0, 6-4 | 2.57 | 1.43 | 
		
			| 13.05. |  | Yamaguchi M. - Mushika M. | Q-R16 | 6-3, 6-4 |  |  | 
		
			| Fukuoka ITF | Round | Result | H | A | 
		
			| 09.05. |  | Rodionova A. - Yamaguchi M. | R16 | 6-3, 6-1 | 1.10 | 6.02 | 
		
			| 08.05. |  | Yamaguchi M. - Miyahara C. | 1R | 6-3, 6-0 | 4.60 | 1.12 | 
		
			| 06.05. |  | Yamaguchi M. - Boulais I. | Q-R16 | 6-1, 6-2 |  |  | 
		
			| Gifu ITF | Round | Result | H | A | 
		
			| 30.04. |  | Lee Y. - Yamaguchi M. | Q-R16 | 6-2, 3-6, 7-5 | 1.41 | 2.93 | 
		
			| 29.04. |  | Yamaguchi M. - Hewitt D. | Q-1R | 4-6, 6-3, 6-3 | 2.12 | 1.61 | 
		
			| Tokyo 6 ITF | Round | Result | H | A | 
		
			| 22.04. |  | Okamura K. - Yamaguchi M. | Q-1R | 6-4, 1-6, 6-3 | 1.82 | 1.83 | 
		
			| Osaka ITF | Round | Result | H | A | 
		
			| 11.04. |  | Chang H. - Yamaguchi M. | R16 | 6-4, 6-2 | 1.43 | 2.62 | 
		
			| 10.04. |  | Yamaguchi M. - Kinoshita H. | 1R | 6-2, 6-4 | 1.18 | 4.32 | 
		
			| 08.04. |  | Yamaguchi M. - Li Y. | Q-R16 | 6-1, 6-2 | 1.06 | 6.56 | 
		
			| 07.04. |  | Yamaguchi M. - Sawashiro K. | Q-2R | 6-1, 6-2 |  |  | 
		
			| Kashiwa ITF | Round | Result | H | A | 
		
			| 31.03. |  | Hule P. - Yamaguchi M. | Q-1R | 6-1, 6-2 | 2.14 | 1.71 | 
		
			| Kofu ITF | Round | Result | H | A | 
		
			| 24.03. |  | Saigo R. - Yamaguchi M. | Q-1R | 6-1, 6-1 | 2.20 | 1.56 | 
		
			| Indore 2 ITF | Round | Result | H | A | 
		
			| 14.03. |  | Jakupovic D. - Yamaguchi M. | R16 | 6-4, 6-2 | 1.26 | 3.56 | 
		
			| 13.03. |  | Yamaguchi M. - Omae A. | 1R | 6-2, 6-1 | 1.35 | 2.85 | 
		
			| Indore ITF | Round | Result | H | A | 
		
			| 01.02. |  | Jakupovic D. - Yamaguchi M. | R16 | 6-0, 6-3 | 1.54 | 2.33 | 
		
			| 30.01. |  | Yamaguchi M. - Koevermans A. | 1R | 6-3, 5-7, 6-4 | 2.11 | 1.55 | 
		
			| 29.01. |  | Yamaguchi M. - Li Y. | Q-R16 | 6-0, 6-3 | 1.11 | 5.19 | 
		
			| 28.01. |  | Yamaguchi M. - Rachapudi P. | Q-1R | 6-2, 6-2 | 1.11 | 5.38 | 
		
			| Pune ITF | Round | Result | H | A | 
		
			| 22.01. |  | Smith T. - Yamaguchi M. | Q-R16 | 6-1, 4-6, 7-5 | 1.82 | 1.83 | 
		
			| 21.01. |  | Yamaguchi M. - Li Y. | Q-1R | 6-4, 6-0 | 5.31 | 1.11 | 
		
			| Bangalore ITF | Round | Result | H | A | 
		
			| 19.01. |  | Sato N. - Yamaguchi M. | QF | 6-4, 7-5 | 1.57 | 2.26 | 
		
			| 18.01. |  | Yamaguchi M. - Prozorova T. | R16 | 6-0, 6-2 | 5.49 | 1.11 | 
		
			| 17.01. |  | Yamaguchi M. - Lansere S. | 1R | 6-2, 6-2 | 3.61 | 1.25 | 
		
			| 15.01. |  | Yamaguchi M. - Marcinkevica D. | Q-R16 | 1-6, 6-2, 6-2 | 2.07 | 1.62 | 
		
			| 14.01. |  | Yamaguchi M. - Saigo Y. | Q-1R | 6-2, 6-0 | 1.07 | 6.31 | 
		
			| Nonthaburi 12 ITF | Round | Result | H | A | 
		
			| 10.01. |  | Matsuda M. - Yamaguchi M. | 1R | 6-2, 6-2 | 1.41 | 2.67 | 
		
			| 08.01. |  | Yamaguchi M. - Yashina E. | Q-R16 | 7-65, 6-3 | 1.33 | 2.87 | 
		
			| 07.01. |  | Yamaguchi M. - Deepoem V. | Q-1R | 6-3, 6-3 | 9.67 | 1.02 |