Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF - Kashiwa M25 | 2023/04/05 03:15 | Ryotaro Taguchi v Daisuke Sumizawa | 6-7,7-6,6-7 |
| ITF - Tsukuba M25 | 2023/03/30 02:50 | Hiroki Moriya v Daisuke Sumizawa | 7-5,6-1 |
| ITF - Tsukuba M25 | 2023/03/29 03:30 | Daisuke Sumizawa v Makoto Ochi | 1-6,7-5,6-4 |
| ITF - Canberra M25 | 2023/03/21 02:50 | Jordan Smith v Daisuke Sumizawa | 6-4,7-6 |
| ITF - Canberra M25 | 2023/03/14 00:20 | Dane Sweeny v Daisuke Sumizawa | 7-6,6-4 |
| ITF - Burnie M25 | 2023/02/08 05:20 | Daisuke Sumizawa v Luke Saville | 3-6,4-6 |
| Challenger Burnie | 2023/01/31 01:40 | Daisuke Sumizawa v Hiroki Moriya | 3-6,3-6 |
| Challenger Burnie | 2023/01/30 00:50 | Daisuke Sumizawa v Derek Pham | 6-4,3-6,6-3 |
| ITF - Kashiwa M25 | 2023/04/04 01:00 | Takeru Yuzuki v Yunseong Chung | 2-6,2-6 |
| ITF - Tsukuba M25 | 2023/03/29 00:30 | Kazuki Nishiwaki v Yunseong Chung | 6-2,6-3 |
| Challenger Pune | 2023/02/28 13:00 | Miljan Zekic v Yunseong Chung | 6-3,6-4 |
| Challenger Pune | 2023/02/27 07:05 | Jay Clarke v Yunseong Chung | 6-7,3-6 |
| Challenger Pune | 2023/02/26 10:30 | Nitin Kumar Sinha v Yunseong Chung | 2-6,2-6 |
| Challenger Bengaluru | 2023/02/20 07:25 | Nikola Milojevic v Yunseong Chung | 7-6,6-4 |
| Challenger Bengaluru | 2023/02/19 11:15 | Dayne Kelly v Yunseong Chung | 6-7,4-6 |
| Challenger Manama | 2023/02/12 08:00 | Yunseong Chung v Aleksandr Braynin | 5-7,4-6 |