| Chinese Taipei Open - Kval | 2019/09/03 05:30 | Pang Fong Pui v Chih Chieh Yang | W | 0-2 |
| Australian Open - Kval | 2019/06/04 03:30 | Chico Aura Dwi Wardoyo v Chih Chieh Yang | L | 2-1 |
| Australian Open - Kval | 2019/06/04 00:35 | Jason Anthony Ho-Shue v Chih Chieh Yang | W | 1-2 |
| Vietnam Int. | 2019/04/11 11:45 | Jia Wei Tan v Chih Chieh Yang | L | 2-0 |
| Vietnam Int. | 2019/04/09 11:30 | Yehezkiel Fritz Mainaky v Chih Chieh Yang | W | 0-2 |
| China Masters | 2019/03/15 10:50 | Iskandar Zulkarnain v Chih Chieh Yang | L | 2-1 |
| China Masters | 2019/03/14 07:40 | Jiahao Yu v Chih Chieh Yang | W | 1-2 |
| China Masters | 2019/03/13 11:20 | Shumin Liu v Chih Chieh Yang | W | 1-2 |
| Akita Masters | 2019/08/16 02:15 | Yu Igarashi v Koki Watanabe | L | 2-1 |
| Akita Masters | 2019/08/15 05:25 | Koki Watanabe v Pannawit Thongnuam | W | 2-0 |
| Akita Masters | 2019/08/14 02:10 | Koki Watanabe v Minoru Koga | W | 2-0 |
| US Open | 2019/07/11 22:00 | Dong Keun Lee v Koki Watanabe | L | 2-1 |
| US Open | 2019/07/10 22:10 | Victor Svendsen v Koki Watanabe | W | 0-2 |
| Canada Open | 2019/07/06 21:30 | Koki Watanabe v Shifeng Li | L | 1-2 |
| Canada Open | 2019/07/05 22:00 | Rajiv Ouseph v Koki Watanabe | W | 0-2 |
| Canada Open | 2019/07/04 21:55 | Lanxi Lei v Koki Watanabe | W | 1-2 |