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