| 1984-10-22 | Hong Kong | Hard | R32 | 62 |  Tom Gullikson | 614 |  Shinichi Sakamoto | 6-2 6-4 | H2H | 3 | - | - | - | - | - | - | - |
| 1984-10-08 | Tokyo-1 | Hard | R64 | 98 | Jay Lapidus (15) | 613 | Shinichi Sakamoto | 6-7 6-2 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1983-10-17 | Tokyo-1 | Hard | R64 | 37 |  Gianni Ocleppo (5) | 514 | Shinichi Sakamoto | 6-2 6-4 | H2H | 3 | - | - | - | - | - | - | - |
| 1982-02-01 | Davis Cup G1 QF: TPE vs JPN | Hard | RR | 482 | Shinichi Sakamoto | - |  Huang-Jung Hsu | 4-6 6-2 7-5 | H2H | 3 | - | - | - | - | - | - | - |
| 1982-02-01 | Davis Cup G1 QF: TPE vs JPN | Hard | RR | 482 | Shinichi Sakamoto | 828 | Chang-Rung Wu | 6-4 6-3 5-7 7-5 | H2H | 5 | - | - | - | - | - | - | - |
| 1981-10-19 | Tokyo-1 | Clay | R32 | 46 |  Heinz Gunthardt (7) | 608 | Shinichi Sakamoto | 6-4 2-6 6-1 | H2H | 3 | - | - | - | - | - | - | - |
| 1981-10-19 | Tokyo-1 | Clay | R64 | 608 | Shinichi Sakamoto | - | Toyokazu Tomogane | 7-5 6-1 | H2H | 3 | - | - | - | - | - | - | - |
| 1981-10-02 | Davis Cup WG PO: FRA vs JPN | Clay | RR | 52 |  Thierry Tulasne | 592 | Shinichi Sakamoto | 6-0 6-0 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 1981-10-02 | Davis Cup WG PO: FRA vs JPN | Clay | RR | 104 | Christophe Roger-Vasselin | 592 | Shinichi Sakamoto | 6-0 6-4 6-1 | H2H | 5 | - | - | - | - | - | - | - |
| 1980-10-20 | Tokyo-1 | Clay | R64 | 56 | Peter Rennert (7) | 396 | Shinichi Sakamoto | 6-1 6-2 | H2H | 3 | - | - | - | - | - | - | - |
