| ITF - Fukuoka W60 | 05/10 04:00 | 27 | [98] Zarina Diyas v Risa Ozaki [269] | 6-2,6-0 | |
| ITF - Fukuoka W60 | 05/09 03:55 | 26 | [344] Berfu Cengiz v Risa Ozaki [269] | 3-6,3-6 | |
| ITF - Fukuoka W60 | 05/07 03:20 | 25 | [269] Risa Ozaki v Jamie Loeb [238] | 6-1,6-7,6-2 | |
| ITF - Gifu W80 | 05/03 02:15 | 27 | [271] Risa Ozaki v Maddison Inglis [314] | 7-6,2-6,2-6 | |
| ITF - Gifu W80 | 05/02 03:20 | 26 | [164] Danielle Lao v Risa Ozaki [271] | 2-6,3-6 | |
| ITF - Gifu W80 | 04/30 02:35 | 25 | [189] Kristie Ahn v Risa Ozaki [271] | 2-6,3-6 | |
| ITF - Osaka W25 | 04/11 02:45 | 26 | [262] Risa Ozaki v Erika Sema [400] | 5-7,6-7 | |
| ITF - Osaka W25 | 04/09 01:00 | 25 | Risa Ozaki v Mei Yamaguchi | 6-4,4-6,6-2 | |
| ITF - Kashiwa W25 | 04/02 05:10 | 25 | Risa Ozaki v Daria Snigur | 6-0,3-6,4-6 | |
| ITF - Canberra W25 | 03/27 00:00 | 25 | [289] Risa Ozaki v Alison Bai [349] | 2-6,4-6 | |
| ITF - Canberra W25 | 03/24 00:00 | 29 | [289] Risa Ozaki v Destanee Aiava [202] | 2-6,2-6 | |
| ITF - Canberra W25 | 03/23 01:40 | 28 | [289] Risa Ozaki v Eri Hozumi [318] | 6-2,7-5 | |
| ITF - Canberra W25 | 03/22 00:50 | 27 | [289] Risa Ozaki v Maddison Inglis [369] | 6-7,7-6,7-5 | |
| ITF - Canberra W25 | 03/20 23:00 | 26 | [165] Irina Maria Bara v Risa Ozaki [289] | 6-7,2-6 | |
| ITF - Canberra W25 | 03/19 00:45 | 25 | Risa Ozaki v Gabriella Da Silva Fick | 6-0,6-3 | |
| ITF W25 Nishi-Tama | 03/13 03:15 | 25 | [287] Risa Ozaki v Giulia G-Monticone [212] | 2-6,2-6 | |
| ITF - Yokohama W25 | 03/06 06:15 | 25 | [287] Risa Ozaki v Mayo Hibi [264] | 6-3,3-6,2-6 | |
| ITF - Osaka W25 | 02/26 02:40 | 45 | [289] Risa Ozaki v Miharu Imanishi [311] | 6-3,1-6,7-10 | |
| ITF - Osaka W25 | 02/25 02:30 | 45 | Risa Ozaki v Olivia Tjandramulia | 4-6,7-6,10-5 | |
| ITF - Kyoto W60 | 02/19 04:35 | 25 | [241] Ylena In-Albon v Risa Ozaki [290] | 6-1,6-4 | |
| ITF W25 Singapore | 01/21 02:00 | 45 | Risa Ozaki v Aldila Sutjiadi | 2-6,6-4,4-10 | |
| ITF W25 Singapore | 01/15 02:00 | 45 | [273] Cagla Buyukakcay v Risa Ozaki [294] | 7-6,6-0 | |
| ITF - Hongkong W25 | 01/11 02:00 | 27 | [357] Shuyue Ma v Risa Ozaki [294] | 7-6,7-5 | |
| ITF - Hongkong W25 | 01/10 02:00 | 26 | [294] Risa Ozaki v Fatma Al Nabhani [444] | 3-6,6-3,6-4 | |
| ITF - Hongkong W25 | 01/09 02:30 | 25 | [365] Olivia Tjandramulia v Risa Ozaki [294] | 4-6,2-6 | |
| ITF - Hongkong W25 | 01/03 02:00 | 26 | [291] Risa Ozaki v En Shuo Liang [257] | 4-6,3-6 | |
| ITF - Hongkong W25 | 01/02 05:30 | 25 | Jacqueline Cabaj Awad v Risa Ozaki | 2-6,7-5,1-6 | |
| ITF Women Pune | 11/26 08:00 | 25 | [292] Risa Ozaki v Ekaterina Yashina [374] | 4-6,2-6 | |
| ITF Women Norman | 11/14 19:20 | 25 | Maria C O Serrano v Risa Ozaki | 6-4,6-4 | |
| ITF Women Shenzhen | 11/04 06:15 | 54 | [234] Olga Doroshina v Risa Ozaki [293] | 6-4,3-6,7-6 |