Head-to-head · 16 bouts
Ryuko Seiho and Kiyokuni Katsuo have met 16 times in recorded sumo. Kiyokuni Katsuo leads 13–3.
Ryuko Seiho has won with: slap down (1), twisting backward knee trip (1), minor inner foot sweep (1).
Kiyokuni Katsuo has won with: over arm throw (4), frontal force out (4), frontal crush out (2), beltless armthrow (2), frontal push out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1968 | Day 1 | Kiyokuni Katsuo | Over arm throw | Sekiwake 1 East vs Maegashira 3 East |
| March 1969 | Day 14 | Ryuko Seiho | Slap down | Maegashira 9 West vs Sekiwake 1 West |
| May 1969 | Day 2 | Kiyokuni Katsuo | Frontal force out | Maegashira 2 East vs Sekiwake 1 West |
| July 1969 | Day 2 | Ryuko Seiho | Twisting backward knee trip | Ozeki 1 East vs Maegashira 1 East |
| September 1969 | Day 9 | Kiyokuni Katsuo | Frontal force out | Ozeki 1 East vs Maegashira 1 East |
| January 1970 | Day 2 | Kiyokuni Katsuo | Frontal crush out | Maegashira 1 West vs Ozeki 2 West |
| March 1970 | Day 5 | Kiyokuni Katsuo | Beltless armthrow | Ozeki 1 East vs Komusubi 1 West |
| May 1970 | Day 10 | Kiyokuni Katsuo | Frontal force out | Komusubi 1 East vs Ozeki 1 West |
| July 1970 | Day 3 | Kiyokuni Katsuo | Frontal crush out | Ozeki 1 East vs Maegashira 3 East |
| November 1970 | Day 8 | Kiyokuni Katsuo | Over arm throw | Komusubi 1 East vs Ozeki 1 West |
| January 1971 | Day 3 | Kiyokuni Katsuo | Over arm throw | Ozeki 1 East vs Maegashira 1 East |
| March 1971 | Day 7 | Kiyokuni Katsuo | Frontal force out | Maegashira 1 West vs Ozeki 2 West |
| May 1971 | Day 9 | Ryuko Seiho | Minor inner foot sweep | Ozeki 2 East vs Maegashira 2 West |
| September 1971 | Day 1 | Kiyokuni Katsuo | Frontal push out | Maegashira 1 West vs Ozeki 1 West |
| November 1971 | Day 2 | Kiyokuni Katsuo | Beltless armthrow | Ozeki 2 East vs Maegashira 3 West |
| September 1973 | Day 7 | Kiyokuni Katsuo | Over arm throw | Maegashira 5 West vs Ozeki 2 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.