| ITF W100 Tokyo | 09/05 04:15 | 25 | [71] Makoto Ninomiya v Viktorija Golubic [135] | 1-6,1-6 | |
| ITF W100 Tokyo | 09/04 01:00 | 54 | [71] Makoto Ninomiya v Erika Sema [489] | 7-6,6-2 | |
| ITF W100 Tokyo | 09/03 04:05 | 54 | [283] En Shuo Liang v Makoto Ninomiya [71] | 6-2,1-6,2-6 | |
| WTA Stanford | 08/12 21:10 | 14 | Makoto Ninomiya v Alexandra Yepifanova | 2-6,0-6 | |
| ITF W25 Makinohara | 10/03 00:50 | 54 | Makoto Ninomiya v Savanna Ly-Nguyen | 0-6,0-6 | |
| WTA Adelaide 2 | 01/09 01:25 | 14 | [131] Xiyu Wang v Makoto Ninomiya [47] | 6-1,6-2 | |
| WTA Lussemburgo | 09/12 10:05 | 19 | [51] Makoto Ninomiya v Anastasia Zakharova [234] | 0-6,3-6 | |
| WTA Lussemburgo | 09/11 08:00 | 14 | [51] Makoto Ninomiya v Ulrikke Eikeri [280] | 6-4,6-3 | |
| WTA Chicago | 08/22 18:30 | 19 | [466] Quinn Gleason v Makoto Ninomiya [53] | 6-3,6-1 | |
| WTA Chicago - Qual. | 08/21 23:35 | 14 | Maya Battle v Makoto Ninomiya | 0-6,0-6 | |
| WTA Montreal | 08/07 19:35 | 14 | [61] Alison Van Uytvanck v Makoto Ninomiya [56] | 6-2,6-0 | |
| WTA Abu Dhabi | 01/05 06:00 | 64 | [66] Makoto Ninomiya v Ena Shibahara [23] | 1-6,4-6 | |
| WTA Hobart | 01/11 00:00 | 45 | [81] Ons Jabeur v Makoto Ninomiya [61] | 6-2,6-1 | |
| ITF W100 Tokyo | 11/14 02:20 | 26 | [59] Makoto Ninomiya v Nao Hibino [103] | Retired | |
| ITF W100 Tokyo | 11/13 02:30 | 25 | [496] Yuriko Lily Miyazaki v Makoto Ninomiya [59] | 3-6,4-6 | |
| ITF W100 Tokyo | 11/11 06:30 | 45 | [412] Risa Ushijima v Makoto Ninomiya [64] | 7-6,4-6,4-10 | |
| ITF W100 Tokyo | 11/11 03:00 | 45 | [64] Makoto Ninomiya v Miyabi Inoue [371] | 7-6,6-2 | |
| WTA Hiroshima | 09/09 05:55 | 45 | [27] Makoto Ninomiya v Harriet Dart [172] | 2-6,7-6,2-6 | |
| ITF Femminile Incheon - Qual. | 05/15 01:00 | 62 | [246] Akiko Omae v Makoto Ninomiya [40] | 6-2,3-6,6-1 | |
| ITF Femminile Incheon - Qual. | 05/14 03:30 | 62 | Sowjanya Bavisetti v Makoto Ninomiya | 3-6,2-6 | |
| ITF Femminile Incheon - Qual. | 05/13 02:00 | 62 | Nadja Gilchrist v Makoto Ninomiya | 1-6,3-6 | |
| ITF femminile Luan | 05/10 02:00 | 26 | [290] Fang Ying Xun v Makoto Ninomiya [40] | 6-1,6-2 | |
| ITF femminile Luan | 05/09 02:00 | 25 | Qianqian Zhao v Makoto Ninomiya | 1-6,3-6 | |
| ITF Femminile Gifu - Qual. | 04/30 03:00 | 54 | Makoto Ninomiya v Mei Yamaguchi | 6-4,4-6,4-6 | |
| ITF Femminile Gifu - Qual. | 04/29 09:40 | 54 | [369] Aiko Yoshitomi v Makoto Ninomiya [40] | 4-6,1-6 | |
| ITF Femminile Gifu - Qual. | 04/29 04:00 | 54 | Chiaki Takamatsu v Makoto Ninomiya | 7-6,0-6,1-6 | |
| ITF femminile Osaka | 04/12 02:25 | 26 | Makoto Ninomiya v Rebecca Marino | 1-6,4-6 | |
| ITF femminile Osaka | 04/11 01:00 | 25 | [39] Makoto Ninomiya v Karman Kaur Thandi [267] | 6-4,6-4 | |
| ITF femminile Osaka - Qual. | 04/09 02:25 | 62 | [370] Erina Hayashi v Makoto Ninomiya [39] | 6-1,6-7,2-6 | |
| ITF femminile Osaka - Qual. | 04/08 03:30 | 62 | Moyuka Uchijima v Makoto Ninomiya | 3-6,4-6 |