| Challenger Yokkaichi |
11/27 01:00 |
25 |
Philip Henning
v
Rei Sakamoto 
|
4-6,3-6
|
|
| Challenger Yokkaichi |
11/26 01:00 |
25 |
Yu Hsiou Hsu
v
Rei Sakamoto
|
Cancelled
|
|
| Challenger Yokkaichi |
11/25 01:00 |
25 |
Yasutaka Uchiyama
v
Rei Sakamoto
|
Cancelled
|
|
| Challenger Yokohama |
11/23 01:00 |
27 |
Rei Sakamoto v
Yuta Shimizu
|
3-6,7-6,6-7
|
|
| Challenger Yokohama |
11/22 03:15 |
26 |
Rei Sakamoto v
Federico Cina
|
7-5,6-4
|
|
| Challenger Yokohama |
11/19 04:55 |
25 |
Jurij Rodionov
v
Rei Sakamoto
|
2-6,4-6
|
|
| Challenger Kobe |
11/12 05:50 |
25 |
Jurij Rodionov
v
Rei Sakamoto
|
6-3,6-2
|
|
| Challenger Kobe |
11/11 02:00 |
19 |
Yan Bai
v
Rei Sakamoto
|
3-6,3-6
|
|
| Challenger Kobe |
11/10 03:35 |
14 |
Rei Sakamoto v
Dane Sweeny
|
6-4,6-2
|
|
| Challenger Matsuyama |
11/05 01:00 |
25 |
Rei Sakamoto v
Elias Ymer
|
1-6,6-7
|
|
| Challenger Sioux Falls |
10/20 17:20 |
14 |
Rei Sakamoto v
Andres Martin
|
4-6,1-6
|
|
| ITF M25 Harlingen |
10/16 18:35 |
25 |
Rei Sakamoto v
Mubarak Shannan Zayid
|
6-3,3-6,4-6
|
|
| ATP Tokyo |
09/23 02:00 |
14 |
Rei Sakamoto v
Luca Nardi
|
3-6,1-6
|
|
| Challenger Las Vegas |
09/09 20:30 |
19 |
Rei Sakamoto v
Quinn Vandecasteele
|
6-4,6-7,1-6
|
|
| Challenger Las Vegas |
09/08 23:30 |
14 |
Felix Corwin
v
Rei Sakamoto
|
6-3,6-7,2-6
|
|
| ITF M25 Southaven |
08/08 20:00 |
26 |
Rei Sakamoto v
Andres Martin
|
6-7,2-6
|
|
| ITF M25 Southaven |
08/07 22:25 |
25 |
Ryan Dickerson
v
Rei Sakamoto
|
6-4,2-6,1-6
|
|
| ITF M25 Edwardsville |
07/31 13:00 |
25 |
Rei Sakamoto v
Gavin Young
|
4-6,5-7
|
|
| ITF M25 La Nucia |
06/01 08:00 |
28 |
Edas Butvilas
v
Rei Sakamoto
|
7-6,6-2
|
|
| ITF M25 La Nucia |
05/31 09:50 |
27 |
Damien Wenger
v
Rei Sakamoto
|
4-6,6-4,6-7
|
|
| ITF M25 La Nucia |
05/30 10:00 |
26 |
Rei Sakamoto v
Slavia Sofia
|
6-4,6-3
|
|
| ITF M25 La Nucia |
05/29 13:15 |
25 |
Lucca Helguera Casado
v
Rei Sakamoto
|
4-6,2-6
|
|
| ITF M15 Cervia |
05/25 11:55 |
28 |
Peter Buldorini
v
Rei Sakamoto
|
6-3,6-1
|
|
| ITF M15 Cervia |
05/24 10:00 |
27 |
Juan Bautista Otegui
v
Rei Sakamoto
|
6-1,5-7,5-7
|
|
| ITF M15 Cervia |
05/23 11:35 |
26 |
Rei Sakamoto v
Andrey Chepelev
|
6-3,6-4
|
|
| ITF M15 Cervia |
05/22 13:00 |
25 |
Rei Sakamoto v
Pietro Ricci
|
6-2,7-6
|
|
| Challenger Tallahassee |
04/14 14:00 |
45 |
Rei Sakamoto v
Alex Rybakov
|
6-4,3-6,0-6
|
|
| ATP Miami |
03/18 15:00 |
14 |
Rei Sakamoto v
Vit Kopriva
|
6-7,6-7
|
|
| ITF M25 Bakersfield |
03/12 21:00 |
25 |
Rei Sakamoto v
Elijah Strode
|
6-4,1-6,2-6
|
|
| ITF M15 Sharm El Sheikh |
02/16 08:00 |
27 |
Rei Sakamoto v
Marek Gengel
|
1-6,5-7
|
|
