Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF W40 Yokohama | 2023/11/27 01:00 | Xinxin Yao v Tsutsumi, Karen | 4-6,4-6 |
| ITF - W15 Hinode | 2023/03/22 01:00 | Tsutsumi, Karen v Honoka Kobayashi | 2-6,1-6 |
| ITF - W15 Hinode | 2023/03/21 01:00 | Tsutsumi, Karen v Shiori Kaneyama | 6-1,6-1 |
| ITF - W15 Hinode | 2023/03/20 03:00 | Nagomi Higashitani v Tsutsumi, Karen | 5-7,3-6 |
| ITF - W15 Hinode | 2023/03/19 01:00 | Tsutsumi, Karen v Furuya, Michiru | 6-2,6-1 |
| ITF W25 Yokohama | 2022/11/09 01:00 | Tsutsumi, Karen v Sakura Hosogi | 2-6,4-6 |
| ITF W25 Yokohama | 2020/03/03 05:25 | Himeno Sakatsume v Tsutsumi, Karen | 6-3,6-1 |
| ITF W25 Yokohama | 2020/03/03 01:00 | Tsutsumi, Karen v Yui Chikaraishi | 6-4,7-6 |
| ITF W40 Yokohama | 2023/11/27 00:55 | Riko Kikawada v Funa Kozaki | 6-7,6-3,1-6 |
| ITF W25 Hamamatsu | 2023/10/13 01:00 | Haruka Kaji v Funa Kozaki | 6-2,2-6,6-2 |
| ITF W25 Hamamatsu | 2023/10/12 01:00 | Mayuka Aikawa v Funa Kozaki | 1-6,3-6 |
| ITF W25 Hamamatsu | 2023/10/10 01:00 | Funa Kozaki v Momoko Kobori | 7-5,7-6 |
| ITF W25 Makinohara | 2023/10/05 00:30 | Rina Saigo v Funa Kozaki | 6-3,6-1 |
| ITF W25 Makinohara | 2023/10/04 01:55 | Funa Kozaki v Miho Kuramochi | 6-3,3-6,6-1 |
| ITF W25 Makinohara | 2023/10/03 00:30 | Funa Kozaki v Rio Tsuda | 6-4,6-2 |
| ITF W40 Nanao | 2023/09/29 01:25 | Miho Kuramochi v Funa Kozaki | 6-2,2-6,6-1 |