Stadium: Court 12 Round: 54 Ground: Grass
| ITF W15 Fukui | 2023/04/26 06:50 | Honori Koyama v Rinon Okuwaki | 2-6,2-6 |
| ITF W15 Fukui | 2023/04/25 01:00 | Britney Chiu v Honori Koyama | 2-6,3-6 |
| ITF W15 Fukui | 2023/04/24 01:00 | Sera Nishimoto v Honori Koyama | 4-6,2-6 |
| ITF W25 Osaka | 2023/04/10 01:00 | Eri Shimizu v Honori Koyama | 7-5,6-0 |
| ITF W15 Hinode | 2023/03/21 01:00 | Chisato Kanemaki v Honori Koyama | 2-6,1-6 |
| UTR Pro Miki Women | 2023/02/19 02:54 | Honori Koyama v Kaho Oyama | 4-6,6-2,6-0 |
| UTR Pro Miki Women | 2023/02/18 08:37 | Kaili Demi Teso v Honori Koyama | 5-7,1-5 |
| UTR Pro Miki Women | 2023/02/17 04:38 | Kaede Tajima v Honori Koyama | 6-3,3-6,6-3 |
| ITF W60 Kurume | 2023/05/16 02:25 | Ai Yamaguchi v Olivia Lincer | 5-7,0-6 |
| ITF W60 Fukuoka | 2023/05/10 01:50 | Ai Yamaguchi v Erika Sema | 0-6,2-6 |
| ITF W15 Fukui | 2023/04/24 02:00 | Ai Yamaguchi v Yui Chikaraishi | 2-6,5-7 |
| ITF W25 Osaka | 2023/04/17 01:00 | Yuka Hosoki v Ai Yamaguchi | 6-1,6-3 |
| ITF W25 Osaka | 2023/04/10 01:00 | Ai Yamaguchi v Riko Sawayanagi | 2-6,4-6 |
| ITF W25 Osaka | 2023/04/09 01:00 | Mei Hasegawa v Ai Yamaguchi | 5-7,3-6 |
| ITF W25 Kofu | 2023/03/27 00:30 | Naho Sato v Ai Yamaguchi | 6-1,6-1 |
| ITF W15 Hinode | 2023/03/22 01:00 | Ai Yamaguchi v Chisa Hosonuma | 4-6,6-3,1-6 |