Stadium: Court A Round: 62 Ground: Hardcourt outdoor
| ITF Women Nishi-Tama | 2018/03/17 03:00 | Kanako Osafune v Mayu Iwai | 3-6,5-7 |
| ITF Women Toyota Qual | 2018/03/12 03:05 | Mayu Iwai v Rika Fujiwara | 3-6,4-6 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | Riko Sawayanagi v Mayu Iwai | 6-0,1-6,2-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Saki Imamura v Mayu Iwai | 5-7,3-6 |
| ITF Women Kofu Qual | 2017/06/11 04:00 | Mayu Iwai v Aoi Ishino | 6-0,6-7,4-6 |
| ITF Women Nishi-Tama | 2017/03/19 01:00 | Yuki Kristina Chiang v Mayu Iwai | 6-2,6-2 |
| Challenger Kaohsiung Qual | 2016/06/14 03:00 | Ayano Shimizu v Mayu Iwai | 6-3,6-3 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | Chisa Hosonuma v Na Ri Kim | 3-6,2-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Haine Ogata v Chisa Hosonuma | 2-6,3-6 |
| ITF Women Mallorca | 2018/02/28 08:30 | Katharina Gerlach v Chisa Hosonuma | 6-3,6-4 |
| ITF Women Mallorca | 2018/02/27 09:50 | Molly Helgesson v Chisa Hosonuma | 0-6,6-7 |
| ITF Women Mallorca | 2018/02/25 08:30 | Chisa Hosonuma v Luminita Tutunaru | 6-0,6-2 |
| ITF Women Mallorca | 2018/02/25 08:30 | Chisa Hosonuma v Svenja Ochsner | 6-3,7-5 |
| ITF Women Mallorca | 2018/02/24 10:00 | Chisa Hosonuma v Keira Blackbeard | 6-1,6-1 |
| ITF Women Mallorca | 2018/02/23 08:10 | Chisa Hosonuma v Marina Bassols Ribera | 7-6,6-7,5-7 |