| Swiss Open WD Qual | 2018/08/28 12:25 | Riichi Takeshita v Kodai Naraoka | L | 2-1 |
| Swiss Open WD Qual | 2018/08/28 10:35 | Fabio Caponio v Kodai Naraoka | W | 0-2 |
| Giraldilla Int. XD | 2018/07/25 06:10 | Sitthikom Thammasin v Kodai Naraoka | L | 2-0 |
| Giraldilla Int. XD | 2018/07/24 01:30 | Kodai Naraoka v Pit Seng Low | W | 2-0 |
| Giraldilla Int. XD | 2018/06/21 22:30 | Thomas Rouxel v Kodai Naraoka | L | 2-1 |
| Giraldilla Int. XD | 2018/06/20 23:50 | Kodai Naraoka v Yuxiang Huang | W | 2-1 |
| Giraldilla Int. XD | 2018/06/20 02:20 | Kodai Naraoka v Antonio Li | W | 2-0 |
| Giraldilla Int. XD | 2018/05/02 08:10 | Kodai Naraoka v Panji Ahmad Maulana | L | 1-2 |
| Giraldilla Int. XD | 2018/11/21 18:40 | Karan Rajan Rajarajan v Rosario Maddaloni | L | 0-2 |
| Dutch Open | 2018/10/09 16:40 | Dinuka Karunaratna v Karan Rajan Rajarajan | L | 2-1 |
| Swiss Open WD Qual | 2018/09/12 15:04 | Kari Gunnarsson v Karan Rajan Rajarajan | W | 0-2 |
| Swiss Open WD Qual | 2018/09/12 11:00 | Rasmus Messerschmidt v Karan Rajan Rajarajan | W | 0-2 |
| Giraldilla Int. XD | 2018/08/29 08:50 | Karan Rajan Rajarajan v Riichi Takeshita | L | 0-2 |
| Swiss Open WD Qual | 2018/08/28 12:08 | Karan Rajan Rajarajan v Joshua Magee | W | 2-0 |
| Swiss Open WD Qual | 2018/08/28 09:56 | Karan Rajan Rajarajan v Kari Gunnarsson | W | 2-0 |
| Giraldilla Int. XD | 2018/05/09 03:20 | Karan Rajan Rajarajan v Sony Dwi Kuncoro | L | 0-2 |