Open d'Angleterre - Double Mixtes 03/14 18:05 4 Koga/Saito v Alfian/Ardianto L 1-2
Open d'Angleterre - Double Mixtes 03/13 18:25 5 Koga/Saito v Man/Tee W 2-0
Open de France - Doubles Hommes 03/05 09:00 5 Jomkoh/Kedren v Koga/Saito - Cancelled
Masters de Thaïlande - Doubles Hommes 02/02 07:15 3 Sukphun/Teeraratsakul v Koga/Saito L 2-1
Masters de Thaïlande - Doubles Hommes 02/01 08:30 4 Koga/Saito v Chang/Po W 2-0
Masters de Thaïlande - Doubles Hommes 01/30 08:50 5 Koga/Saito v Lin/Su W 2-0
Indonesia Masters MD 01/25 09:55 4 Fikri/Maulana v Koga/Saito L 2-0
Indonesia Masters MD 01/23 13:40 5 Koga/Saito v Lu/Yang W 2-1
Open d'Inde - Doubles Hommes 01/17 09:30 5 Saito/Koga v Chia/Soh L 1-2
Open de Malaisie - Doubles Hommes 01/10 07:55 5 Koga/Saito v Ahsan/Setiawan L 0-2
Syed Modi India Int. MD 12/03 12:55 1 Koga/Saito v Choong/Haikal L 1-2
Syed Modi India Int. MD 12/02 17:00 2 Koga/Saito v Kjaer/Sogaard W 2-1
Syed Modi India Int. MD 12/01 13:25 - Koga/Saito v Boe/Faust Kjaer W 2-0
Syed Modi India Int. MD 11/30 09:35 - Koga/Saito v Makhija/Prasad W 2-0
Syed Modi India Int. MD 11/29 06:05 - Koga/Saito v Boon/Goh W 2-0
China Masters MD 11/23 01:55 4 Rankireddy/Shetty v Koga/Saito L 2-0
China Masters MD 11/21 01:00 5 Goh/Izzuddin v Koga/Saito W 1-2
Japan Masters MD 11/17 04:05 - Koga/Saito v Liu/Ou L 0-2
Japan Masters MD 11/16 07:45 - Chia/Soh v Koga/Saito W 0-2
Japan Masters MD 11/14 06:35 5 Koga/Saito v Fikri/Maulana W 2-0
Open de France - Doubles Hommes 10/24 13:10 5 Astrup/Rasmussen v Koga/Saito L 2-0
Denmark Open MD 10/19 16:20 4 Koga/Saito v Ong/Teo L 0-2
Denmark Open MD 10/18 07:45 5 Koga/Saito v Man/Tee W 2-0
Fuzhou China Open 2019, MD 09/07 05:35 4 Liang/Wang v Koga/Saito L 2-0
Fuzhou China Open 2019, MD 09/05 06:35 5 Dunn/Hall v Koga/Saito W 0-2
World Championships MD 08/23 15:55 5 Lee / Wang v Koga/Saito L 2-0
World Championships MD 08/21 13:55 6 Farias FA / Farias Fr v Koga/Saito W 0-2
Australian Open MD 08/04 06:00 3 Lee / Wang v Koga/Saito L 2-0
Australian Open MD 08/03 04:50 4 Madaan/Madaan v Koga/Saito W 0-2
Australian Open MD 08/01 06:00 5 Gutama/Isfahani v Koga/Saito W 0-2