Stadium: Indoor 3 Round: 54
| ITF Women Fukuoka Qual | 2018/05/07 03:05 | Fujiwara, Rika v Hosonuma, Chisa | 7-5,6-4 |
| ITF Women Fukuoka Qual | 2018/05/06 05:25 | Hosonuma, Chisa v Miyahara, Mihoki | 6-1,7-6 |
| ITF Women Hammamet | 2018/04/18 10:25 | Hosonuma, Chisa v de Bernardi, Clothilde | 7-6,3-6,1-6 |
| ITF Women Tunis Qual | 2018/04/08 08:30 | Anna Bondar v Hosonuma, Chisa | 6-2,6-2 |
| ITF Women Tunis Qual | 2018/04/07 11:00 | Damergi, Nour v Hosonuma, Chisa | 0-6,0-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/21 08:20 | Hosonuma, Chisa v Gatto-Monticone, Giulia | 1-6,0-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/19 01:00 | Kawasaki, Mitsumi v Hosonuma, Chisa | 6-1,4-6,2-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/18 01:00 | Iwai, Mayu v Hosonuma, Chisa | 6-7,2-6 |
| ITF Women Fukuoka Qual | 2018/05/06 01:00 | Miyahara, Mina v Naoko Eto | 6-0,6-2 |
| ITF Women Gifu Qual | 2018/04/29 02:55 | Naoko Eto v Myers, Abbie | 0-6,0-6 |
| ITF Women Santa Margherita Qual | 2018/04/01 16:00 | Anastasia Grymalska v Naoko Eto | 6-0,6-0 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/03/28 19:00 | Hogenkamp, Richel v Naoko Eto | 6-0,6-0 |
| ITF Women Santa Margherita Qual | 2018/03/19 15:55 | Honcova, Michaela v Naoko Eto | 6-1,6-1 |
| ITF Women Hong Kong | 2017/12/30 04:30 | Masuda Karrasch, Sheena Jade v Naoko Eto | 6-4,3-6,6-3 |
| WTA Mumbai Qual | 2017/11/18 08:25 | Hiroko Kuwata v Naoko Eto | 6-0,6-0 |
| ITF Women Stockholm | 2017/11/01 13:25 | Naoko Eto v Jacqueline Cabaj Awad | 0-6,1-6 |