Head-to-head · 14 bouts
Ryuko Seiho and Tamanoumi Masahiro have met 14 times in recorded sumo. Tamanoumi Masahiro leads 13–1.
Ryuko Seiho has won with: outside leg trip (1).
Tamanoumi Masahiro has won with: frontal lift out (7), over arm throw (3), frontal force out (1), twisting over arm throw (1), underarm throw (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1968 | Day 10 | Tamanoumi Masahiro | Over arm throw | Ozeki 1 East vs Maegashira 3 East |
| January 1969 | Day 5 | Tamanoumi Masahiro | Frontal lift out | Ozeki 1 East vs Maegashira 3 East |
| May 1969 | Day 3 | Ryuko Seiho | Outside leg trip | Maegashira 2 East vs Ozeki 1 West |
| July 1969 | Day 3 | Tamanoumi Masahiro | Frontal lift out | Maegashira 1 East vs Ozeki 2 West |
| September 1969 | Day 6 | Tamanoumi Masahiro | Frontal force out | Maegashira 1 East vs Ozeki 2 West |
| January 1970 | Day 5 | Tamanoumi Masahiro | Twisting over arm throw | Maegashira 1 West vs Ozeki 1 West |
| March 1970 | Day 2 | Tamanoumi Masahiro | Over arm throw | Komusubi 1 West vs Yokozuna 1 West |
| May 1970 | Day 9 | Tamanoumi Masahiro | Over arm throw | Yokozuna 2 East vs Komusubi 1 East |
| July 1970 | Day 4 | Tamanoumi Masahiro | Underarm throw | Yokozuna 2 East vs Maegashira 3 East |
| November 1970 | Day 4 | Tamanoumi Masahiro | Frontal lift out | Yokozuna 1 East vs Komusubi 1 East |
| January 1971 | Day 6 | Tamanoumi Masahiro | Frontal lift out | Yokozuna 1 East vs Maegashira 1 East |
| March 1971 | Day 5 | Tamanoumi Masahiro | Frontal lift out | Yokozuna 1 East vs Maegashira 1 West |
| May 1971 | Day 2 | Tamanoumi Masahiro | Frontal lift out | Yokozuna 1 East vs Maegashira 2 West |
| September 1971 | Day 6 | Tamanoumi Masahiro | Frontal lift out | Yokozuna 1 East vs Maegashira 1 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.