Stadium: Court B1 Round: 54 Ground: Hardcourt outdoor
| ITF W15 Gimcheon | 2019/06/18 01:00 | Chisa Hosonuma v Jeongyun Lee | 2-6,4-6 |
| ITF W15 Gimcheon | 2019/06/17 01:00 | Chisa Hosonuma v SinHee Kim | 6-3,6-3 |
| ITF W25 Karuizawa | 2019/05/21 04:30 | Kanako Morisaki v Chisa Hosonuma | 6-3,6-2 |
| ITF W25 Karuizawa | 2019/05/20 01:00 | Kiko Nishizato v Chisa Hosonuma | 1-6,4-6 |
| ITF W60 Kurume | 2019/05/13 01:55 | Chisa Hosonuma v Ena Shibahara | 2-6,3-6 |
| ITF W15 Cancun | 2019/03/19 19:00 | Magali Kempen v Chisa Hosonuma | 6-3,6-2 |
| ITF W15 Cancun | 2019/03/16 13:30 | Maria Camila Osorio v Chisa Hosonuma | 6-3,6-1 |
| ITF W15 Cancun | 2019/03/15 13:00 | Chisa Hosonuma v Kirsten-Andrea Weedon | 6-4,6-2 |
| ITF W15 Hua Hin | 2019/07/09 02:30 | Honoka Kobayashi v Lunda Kumhom | 2-6,2-6 |
| ITF W15 Hua Hin | 2019/07/08 03:25 | Honoka Kobayashi v Thitirat Kanaphuet | 6-0,6-0 |
| ITF W15 Hua Hin | 2019/07/03 04:00 | Da Hye Kim v Honoka Kobayashi | 6-3,6-4 |
| ITF W15 Hua Hin | 2019/07/02 03:00 | Honoka Kobayashi v Mingyang Liu | 6-3,6-0 |
| ITF W15 Hua Hin | 2019/07/01 03:00 | Honoka Kobayashi v Sarah Pang | 6-0,6-0 |
| ITF W15 Gimcheon | 2019/06/19 01:00 | Ayumi Koshiishi v Honoka Kobayashi | 4-6,6-4,6-4 |
| ITF W15 Gimcheon | 2019/06/18 01:00 | Honoka Kobayashi v Chihiro Takayama | 6-1,6-1 |
| ITF W15 Gimcheon | 2019/06/17 01:00 | Honoka Kobayashi v So Hee Jung | 2-6,7-5,11-9 |