| Year | Tournament | Result | Player | Age | Nation |
|---|---|---|---|---|---|
| 1972 | French Open | R64 | Kazuko Sawamatsu | 21 | Japan |
| 1972 | Australian Open | R32 | Jun Kuki | 26 | Japan |
| 1972 | Australian Open | R32 | Kiyoshi Tanabe | 23 | Japan |
| 1971 | US Open | R32 | Toshiro Sakai | 23 | Japan |
| 1971 | US Open | R64 | Jun Kuki | 25 | Japan |
| 1971 | US Open | R64 | Junko Sawamatsu | 23 | Japan |
| 1971 | US Open | R128 | Kenichi Hirai | 21 | Japan |
| 1971 | Wimbledon | R32 | Kazuko Sawamatsu | 20 | Japan |
| 1971 | Wimbledon | R128 | Toshiro Sakai | 23 | Japan |
| 1971 | Wimbledon | R128 | Jun Kuki | 25 | Japan |
| 1971 | Wimbledon | R128 | Keishiro Yanagi | 30 | Japan |
| 1971 | French Open | R16 | Kazuko Sawamatsu | 20 | Japan |
| 1971 | French Open | R32 | Jun Kuki | 25 | Japan |
| 1971 | French Open | R64 | Toshiro Sakai | 23 | Japan |
| 1971 | Australian Open | R64 | Osamu Ishiguro | 34 | Japan |
| 1970 | US Open | R64 | Chikako Murakami | n/a | Japan |
| 1970 | Wimbledon | R32 | Kazuko Sawamatsu | 19 | Japan |
| 1970 | Wimbledon | R64 | Chikako Murakami | n/a | Japan |
| 1970 | Wimbledon | R128 | Koji Watanabe | 28 | Japan |
| 1970 | Wimbledon | R128 | Kimiyo Hatanaka | n/a | Japan |
| 1970 | French Open | R64 | Kazuko Sawamatsu | 19 | Japan |
| 1970 | French Open | R64 | Kimiyo Hatanaka | n/a | Japan |
| 1970 | French Open | R128 | Jun Kuki | 24 | Japan |
| 1970 | French Open | R128 | Koji Watanabe | 28 | Japan |
| 1969 | US Open | R64 | Kimiyo Hatanaka | n/a | Japan |
| 1969 | Wimbledon | R64 | Koji Watanabe | 27 | Japan |
| 1969 | Wimbledon | R128 | Keishiro Yanagi | 28 | Japan |
| 1969 | Wimbledon | R128 | Kazuko Sawamatsu | 18 | Japan |
| 1969 | French Open | R32 | Kazuko Sawamatsu | 18 | Japan |
| 1969 | French Open | R64 | Junko Sawamatsu | 21 | Japan |
| 1969 | French Open | R64 | Yaeko Matsuda | n/a | Japan |
| 1969 | French Open | R128 | Isao Watanabe | 27 | Japan |
| 1969 | Australian Open | R64 | Koji Watanabe | 27 | Japan |
| 1968 | Wimbledon | R128 | Koji Watanabe | 26 | Japan |
| 1968 | Wimbledon | R128 | Kazuko Sawamatsu | 17 | Japan |
| 1968 | French Open | R128 | Isao Watanabe | 26 | Japan |
| 1968 | French Open | R128 | Kazuko Sawamatsu | 17 | Japan |
| 1968 | French Open | R128 | Junko Sawamatsu | 20 | Japan |
Open Era Grand Slam Tennis
This site is dedicated to Grand Slam tennis stats from the Open Era – for those of us who love the numbers behind the game. Pick any group of players and see how they rank. Compare, filter, and view the same data from different angles – whether you want to explore dominance, consistency, or longevity. In short: It’s all about turning tennis history into insights you can actually play with.