| Olympijské hry 2020 - mužské týmy 2020 | 08/02 05:30 | 3 | Ishiy/Tsuboi v Lee/Jeoung | L | 0-3 | |
| Olympijské hry 2020 - mužské týmy 2020 | 08/01 05:30 | - | Ishiy/Tsuboi v Peto/Jevtovic | L | 1-3 | |
| WTT Star Contender Doha - čtyřhra muži | 03/09 15:55 | 1 | Lee/Jeoung v Ishiy/Tsuboi | L | 3-1 | |
| WTT Contender Dauhá - čtyřhra muži | 03/03 17:15 | 1 | Ishiy/Tsuboi v Robles/Ionescu | L | 2-3 | |
| German Open - čtyřhra muži | 01/29 14:10 | - | Ishiy/Tsuboi v Allegro/Lambiet | L | 1-3 | |
| Austrian Open - čtyřhra muži | 11/14 11:25 | 4 | Jeoung/Lee v Ishiy/Tsuboi | L | 3-1 | |
| Swedish Open MD | 10/03 11:40 | 5 | Ishiy/Tsuboi v Liang/Lin | L | 0-3 | |
| Swedish Open MD | 10/02 14:30 | - | Rolland/De Nodrest v Ishiy/Tsuboi | W | 0-3 | |
| Swedish Open MD | 10/02 14:30 | - | De Nodrest/Rolland v Ishiy/Tsuboi | W | 0-3 |