| UTR Pro Suita | 04/28 00:30 | - | Natsuki Yamamoto v Hiiro Sakamoto | 6-4,7-6 | |
| UTR Pro Suita | 04/27 08:30 | - | Natsuki Yamamoto v Kai Kawano | 7-5,6-2 | |
| UTR Pro Suita | 04/26 04:43 | - | Natsuki Yamamoto v Kohtaro Kuriyama | 6-2,3-6,2-6 | |
| UTR Pro Suita | 04/23 06:08 | - | Natsuki Yamamoto v Shion Itsusaki | 7-6,4-6,6-4 | |
| UTR Pro Suita | 04/22 02:00 | - | Yuta Kikuchi v Natsuki Yamamoto | 6-3,6-4 | |
| ITF M15 Kashiwa | 03/31 01:00 | 54 | Natsuki Yamamoto v Woobin Shin | 2-6,1-6 | |
| UTR Pro Kawaguchi | 03/10 01:00 | - | Natsuki Yamamoto v Christopher Kosei Ono | View | |
| UTR Pro Kawaguchi | 03/09 00:00 | - | Natsuki Yamamoto v Koki Takada | 2-6,6-1,6-2 | |
| UTR Pro Kawaguchi | 03/08 03:30 | - | Natsuki Yamamoto v Oliver Welch | 6-3,6-4 | |
| UTR Pro Kawaguchi | 03/07 02:30 | - | Natsuki Yamamoto v Yuki Karatsu | 6-0,5-0 | |
| UTR Pro Kawaguchi | 03/06 23:30 | - | Yusuke Yoshikawa v Natsuki Yamamoto | 6-1,6-2 | |
| UTR Pro Kawaguchi | 03/04 06:31 | - | Taisei Miyamoto v Natsuki Yamamoto | 6-4,7-6 | |
| UTR Pro Kawaguchi | 03/03 00:30 | - | Natsuki Yamamoto v Naoto Tomizawa | 6-3,6-3 | |
| ITF M15 Monastir | 01/07 08:00 | 62 | Natsuki Yamamoto v Nazim Makhlouf | 5-7,4-6 | |
| ITF M15 Monastir | 01/01 13:00 | 62 | Maxence Bertimon v Natsuki Yamamoto | 6-1,6-1 | |
| ITF M15 Monastir | 01/01 09:00 | 62 | Natsuki Yamamoto v Luca Matteo Sobbe | 6-3,3-6,10-8 | |
| ITF M15 Monastir | 12/31 08:00 | 62 | Christoph Gayk v Natsuki Yamamoto | 4-6,2-6 | |
| ITF M15 Monastir | 12/25 09:00 | 62 | Anas Bennour Dit Sahli v Natsuki Yamamoto | 6-2,7-6 | |
| ITF M15 Monastir | 12/24 08:00 | 62 | Natsuki Yamamoto v Vitali Shvets | 6-1,6-3 | |
| UTR Pro Noda | 10/21 04:28 | - | Yuto Takahashi v Natsuki Yamamoto | 7-6,7-6 | |
| UTR Pro Noda | 10/20 00:00 | - | Kazuma Kawachi v Natsuki Yamamoto | 6-4,6-1 | |
| UTR Pro Noda | 10/19 04:20 | - | Sota Tani v Natsuki Yamamoto | 6-7,6-7 | |
| UTR Pro Noda | 10/18 00:00 | - | Chaitanya Irkar v Natsuki Yamamoto | 2-6,4-5 | |
| UTR Pro Noda | 10/16 05:00 | - | Yuto Okuchi v Natsuki Yamamoto | 2-6,3-6 | |
| ITF M25 Takasaki | 09/18 00:50 | 19 | Ryotaro Matsumura v Natsuki Yamamoto | 6-2,6-1 | |
| ITF M25 Takasaki | 09/17 01:00 | 54 | Natsuki Yamamoto v Taki Adachi | 6-3,6-3 | |
| UTR Pro Miki | 07/01 04:41 | - | Yuzuki Shinde v Natsuki Yamamoto | 6-1,6-3 | |
| UTR Pro Miki | 06/30 00:30 | - | Natsuki Yamamoto v Kent Tagashira | 6-1,6-2 | |
| UTR Pro Miki | 06/29 03:30 | - | Natsuki Yamamoto v Taiyo Kurata | 6-7,0-6 | |
| UTR Pro Miki | 06/28 00:30 | - | Sota Minami v Natsuki Yamamoto | 4-6,6-7 |