| Pune challenger | Round | Result | H | A | 
		
			| 13.11. |  | Diez S. - Takahashi Y. | 2R | 6-2, 6-2 | 1.16 | 4.82 | 
		
			| 11.11. |  | Takahashi Y. - Vishwakarma S. | 1R | 6-0, 3-6, 6-3 | 1.14 | 5.25 | 
		
			| Liuzhou challenger | Round | Result | H | A | 
		
			| 21.10. |  | Kalenichenko D. - Takahashi Y. | 1R | 6-2, 6-2 | 2.62 | 1.45 | 
		
			| Futures 2019 | Round | Result | H | A | 
		
			| 04.10. |  | Nishiwaki K. - Takahashi Y. | QF | 6-0, 3-6, 6-2 | 2.88 | 1.32 | 
		
			| 03.10. |  | Takahashi Y. - Nakagawa N. | R16 | 6-4, 6-3 | 1.48 | 2.38 | 
		
			| 01.10. |  | Takahashi Y. - Trinh L. | 1R | 6-1, 6-4 | 1.05 | 7.28 | 
		
			| Shanghai challenger | Round | Result | H | A | 
		
			| 11.09. |  | Uchida K. - Takahashi Y. | 2R | 4-6, 7-68, 6-0 | 1.66 | 2.13 | 
		
			| 10.09. |  | Takahashi Y. - Wang C. | 1R | 6-4, 6-4 | 1.32 | 3.16 | 
		
			| Futures 2019 | Round | Result | H | A | 
		
			| 07.09. |  | Ochi M. - Takahashi Y. | SF | 6-2, 4-6, 6-1 | 2.22 | 1.56 | 
		
			| 06.09. |  | Takahashi Y. - Saito T. | QF | 6-2, 6-2 | 1.42 | 2.57 | 
		
			| 05.09. |  | Takahashi Y. - Mousley B. | R16 | 6-2, 65-7, 6-3 | 1.60 | 2.13 | 
		
			| 04.09. |  | Takahashi Y. - Huang T. | 1R | 6-2, 6-1 | 1.16 | 4.33 | 
		
			| Yokkaichi challenger | Round | Result | H | A | 
		
			| 08.08. |  | Chung H. - Takahashi Y. | R16 | 3-6, 6-1, 6-4 | 1.05 | 8.81 | 
		
			| 07.08. |  | Takahashi Y. - Nishiwaki K. | 2R | 7-5, 3-6, 6-3 | 1.23 | 3.85 | 
		
			| Chengdu challenger | Round | Result | H | A | 
		
			| 30.07. |  | Bai Y. - Takahashi Y. | 2R | 6-4, 6-2 | 1.18 | 4.44 | 
		
			| 29.07. |  | Takahashi Y. - Okamura I. | 1R | 6-1, 6-2 | 1.11 | 5.55 | 
		
			| Futures 2019 | Round | Result | H | A | 
		
			| 26.07. |  | Tokuda R. - Takahashi Y. | QF | 6-1, 7-5 | 1.39 | 2.66 | 
		
			| 25.07. |  | Takahashi Y. - Yamasaki J. | R16 | 6-2, 6-2 | 2.21 | 1.56 | 
		
			| 24.07. |  | Takahashi Y. - Renard L. | 1R | 5-7, 7-63, 6-2 | 1.09 | 5.82 | 
		
			| 18.07. |  | Yu C. - Takahashi Y. | R16 | 7-5, 6-2 | 4.10 | 1.19 | 
		
			| 16.07. |  | Takahashi Y. - Tsai C. | 1R | 7-64, 6-1 | 1.07 | 6.47 | 
		
			| 25.06. |  | Zheng W. - Takahashi Y. | 1R | 6-4, 6-2 | 5.13 | 1.11 | 
		
			| 14.06. |  | Tseng C. - Takahashi Y. | QF | 4-6, 7-5, 6-1 | 1.59 | 2.16 | 
		
			| 13.06. |  | Takahashi Y. - Zhu M. | R16 | 6-3, 3-6, 6-3 | 1.13 | 5.07 | 
		
			| 12.06. |  | Takahashi Y. - Yeung P. | 1R | 6-4, 6-3 | 1.11 | 5.31 | 
		
			| 07.06. |  | Sekiguchi S. - Takahashi Y. | QF | 6-3, 6-3 | 1.26 | 3.39 | 
		
			| 06.06. |  | Takahashi Y. - Vidal Azorin J. | R16 | 6-2, 7-65 | 1.36 | 2.86 | 
		
			| 05.06. |  | Takahashi Y. - Becroft I. | 1R | 6-4, 6-3 | 1.01 | 10.84 | 
		
			| 23.05. |  | Stevenson K. - Takahashi Y. | R16 | 1-6, 6-4, 6-2 | 4.60 | 1.14 | 
		
			| 21.05. |  | Takahashi Y. - Wattanakul P. | 1R | 6-4, 6-4 | 1.07 | 6.37 | 
		
			| Gwangju challenger | Round | Result | H | A | 
		
			| 14.05. |  | Mukund S. - Takahashi Y. | 2R | 6-1, 6-4 | 1.71 | 2.04 | 
		
			| Puerto Vallarta challenger | Round | Result | H | A | 
		
			| 04.05. |  | Smith J. - Takahashi Y. | QF | 6-3, 6-4 | 1.37 | 2.93 | 
		
			| 02.05. |  | Takahashi Y. - Ward J. | R16 | 2-6, 6-4, 6-3 | 3.84 | 1.23 | 
		
			| 01.05. |  | Takahashi Y. - Ayeni A. | 2R | 6-4, 4-6, 6-3 | 1.40 | 2.79 | 
		
			| 29.04. |  | Takahashi Y. - Ortega-Olmedo R. | 1R | 7-5, 6-1 | 3.36 | 1.30 | 
		
			| Leon challenger | Round | Result | H | A | 
		
			| 22.04. |  | Ortega-Olmedo R. - Takahashi Y. | 1R | 6-4, 6-4 | 1.38 | 2.86 | 
		
			| Futures 2019 | Round | Result | H | A | 
		
			| 06.04. |  | Mochizuki Y. - Takahashi Y. | SF | 7-64, 6-4 | 2.42 | 1.48 | 
		
			| 05.04. |  | Takahashi Y. - Tanaka Y. | QF | 7-5, 6-2 | 1.22 | 3.76 | 
		
			| 04.04. |  | Takahashi Y. - Saitoh K. | R16 | 6-2, 6-1 | 1.15 | 4.55 | 
		
			| 02.04. |  | Takahashi Y. - Noguchi R. | 1R | 6-3, 3-6, 7-5 | 1.53 | 2.31 | 
		
			| 22.03. |  | Yamasaki J. - Takahashi Y. | QF | 6-3, 6-1 | 2.42 | 1.48 | 
		
			| 21.03. |  | Takahashi Y. - Tajima N. | R16 | 6-3, 6-2 | 1.36 | 2.80 | 
		
			| 19.03. |  | Takahashi Y. - Lu T. | 1R | 5-3 | 1.29 | 3.35 | 
		
			| 05.03. |  | Imai S. - Takahashi Y. | 1R | 6-1, 5-7, 6-3 | 2.05 | 1.66 | 
		
			| Yokohama challenger | Round | Result | H | A | 
		
			| 25.02. |  | Echargui M. - Takahashi Y. | 1R | 7-5, 5-7, 6-2 | 2.63 | 1.44 | 
		
			| Launceston challenger | Round | Result | H | A | 
		
			| 31.01. |  | Purcell M. - Takahashi Y. | R16 | 6-4, 6-4 | 1.22 | 3.93 | 
		
			| 30.01. |  | Takahashi Y. - Moriya H. | 2R | 6-3, 6-4 | 3.04 | 1.34 | 
		
			| 28.01. |  | Takahashi Y. - Altmaier D. | 1R | 4-6, 6-4, 6-4 | 4.05 | 1.22 | 
		
			| Da Nang challenger | Round | Result | H | A | 
		
			| 08.01. |  | Avidzba A. - Takahashi Y. | 2R | 6-4, 6-2 | 1.91 | 1.82 | 
		
			| Noumea challenger | Round | Result | H | A | 
		
			| 31.12. |  | Sakharov G. - Takahashi Y. | 1R | 6-4, 6-1 | 1.23 | 3.85 |