Stadium: Court 3 Round: 25 Ground: Hardcourt indoor
| Challenger Yokkaichi | 2019/08/05 05:05 | Shintaro Imai v Naoki Tajima | 6-2,6-3 |
| ITF M25 Nonthaburi | 2019/07/25 07:10 | Naoki Tajima v Yuta Shimizu | 0-6,4-6 |
| ITF M25 Nonthaburi | 2019/07/24 02:00 | Niki Kaliyanda Poonacha v Naoki Tajima | 4-6,6-4,1-6 |
| ITF M15 Saarlouis | 2019/07/02 12:00 | Naoki Tajima v Dominik Boehler | 2-6,2-6 |
| ITF M15 Kamen | 2019/06/26 11:30 | Naoki Tajima v Luca Staeheli | 5-7,0-6 |
| ITF M15 Balatonalmadi | 2019/06/19 09:50 | Ryan Nijboer v Naoki Tajima | 6-3,6-2 |
| ITF M15 Irpin | 2019/05/28 07:00 | Oleg Prihodko v Naoki Tajima | 6-0,6-1 |
| ITF M15 Irpin | 2019/05/21 12:40 | Nikita Mashtakov v Naoki Tajima | 6-0,7-6 |
| ITF M15 Helsinki | 2019/08/21 10:55 | Oskar Antinheimo v Patrik Niklas-Salminen | 2-6,2-6 |