| WTT Feeder Havirov | 04/15 10:00 | 6 | Andrea Landrieu v Ryoichi Yoshiyama | L | 3-1 | |
| WTT Feeder Dusseldorf | 04/11 16:45 | 3 | Ryoichi Yoshiyama v Dongsoo Kang | L | 1-3 | |
| WTT Feeder Dusseldorf | 04/11 12:00 | 4 | Benedikt Duda v Ryoichi Yoshiyama | W | 1-3 | |
| WTT Feeder Dusseldorf | 04/10 17:00 | 5 | Ryoichi Yoshiyama v Finn Luu | W | 3-0 | |
| WTT Feeder Dusseldorf | 04/10 12:20 | 6 | Daniel Gonzalez v Ryoichi Yoshiyama | W | 2-3 | |
| Japan T League | 03/23 10:30 | - | Shunsuke Togami v Ryoichi Yoshiyama | L | 3-0 | |
| Japan T League | 03/22 11:30 | - | Maharu Yoshimura v Ryoichi Yoshiyama | W | 0-1 | |
| WTT Feeder Biella | 12/17 10:00 | 2 | Ryoichi Yoshiyama v Benedikt Duda | L | 1-3 | |
| WTT Feeder Biella | 12/16 16:10 | 3 | Adrien Rassenfosse v Ryoichi Yoshiyama | W | 2-3 | |
| WTT Feeder Biella | 12/15 18:25 | 4 | Ryoichi Yoshiyama v Yaroslav Zhmudenko | W | 3-1 | |
| WTT Feeder Biella | 12/15 12:05 | 5 | Mihai Bobocica v Ryoichi Yoshiyama | W | 2-3 | |
| WTT Feeder Biella | 12/14 16:15 | 6 | Ryoichi Yoshiyama v John Oyebode | W | 3-2 | |
| Japan T League | 11/17 10:30 | - | Jaehyun An v Ryoichi Yoshiyama | L | 3-2 | |
| WTT Contender Taiyuan Quals | 11/07 12:25 | - | Niagol Stoyanov v Ryoichi Yoshiyama | L | 3-2 | |
| WTT Feeder Doha II | 10/18 10:15 | 4 | Yew En Koen Pang v Ryoichi Yoshiyama | L | 3-2 | |
| WTT Feeder Doha II | 10/17 16:00 | 5 | Ryoichi Yoshiyama v Cedric Nuytinck | W | 3-1 | |
| WTT Feeder Doha II | 10/17 08:25 | 6 | Hyuk Kwon v Ryoichi Yoshiyama | W | 1-3 | |
| WTT Star Contender Lanzhou | 10/06 06:30 | 4 | Ryoichi Yoshiyama v Jinbao Ma | L | 2-3 | |
| WTT Star Contender Lanzhou | 10/05 06:30 | - | Hiroto Shinozuka v Ryoichi Yoshiyama | W | 2-3 | |
| WTT Star Contender Lanzhou | 10/04 11:40 | - | Ryoichi Yoshiyama v Junsung Oh | W | 3-2 | |
| WTT Star Contender Lanzhou Quals | 10/03 08:00 | - | Ryoichi Yoshiyama v Manush U. Shah | W | 3-0 | |
| WTT Star Contender Lanzhou Quals | 10/02 01:35 | - | Hon Ming Li v Ryoichi Yoshiyama | W | 1-3 | |
| Japan T League | 08/20 05:40 | - | Satoshi Aida v Ryoichi Yoshiyama | L | 3-2 | |
| Japan T League | 08/11 04:20 | - | Hiroto Shinozuka v Ryoichi Yoshiyama | L | 3-1 | |
| Japan T League | 08/06 06:16 | - | Ryoichi Yoshiyama v Daito Shinozuka | L | 1-3 | |
| WTT Contender Zagreb Quals | 06/28 11:20 | - | Ryoichi Yoshiyama v Dongsoo Kang | L | 0-3 | |
| WTT Contender Zagreb Quals | 06/27 18:40 | - | Ganghyeon Park v Ryoichi Yoshiyama | W | 1-3 | |
| WTT Contender Zagreb Quals | 06/26 18:20 | - | Bastien Rembert v Ryoichi Yoshiyama | W | 1-3 | |
| Challenger Series TT | 05/30 12:10 | 1 | Simon Berglund v Ryoichi Yoshiyama | W | 2-3 | |
| Challenger Series TT | 05/30 10:45 | 2 | Ryoichi Yoshiyama v Carlo Rossi | W | 3-1 |