Head-to-head · 13 bouts
Mitoizumi Masayuki and Musashimaru Koyo have met 13 times in recorded sumo. Musashimaru Koyo leads 10–3.
Mitoizumi Masayuki has won with: over arm throw (2), frontal force out (1).
Musashimaru Koyo has won with: frontal push out (5), frontal force out (4), hand pull down (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| November 1991 | Day 11 | Musashimaru Koyo | Frontal force out | Maegashira 2 East vs Maegashira 12 East |
| January 1992 | Day 9 | Mitoizumi Masayuki | Over arm throw | Maegashira 1 East vs Maegashira 3 East |
| March 1992 | Day 2 | Musashimaru Koyo | Frontal push out | Maegashira 1 West vs Komusubi 2 West |
| May 1992 | Day 11 | Musashimaru Koyo | Frontal push out | Komusubi 2 West vs Komusubi 1 West |
| July 1992 | Day 9 | Mitoizumi Masayuki | Frontal force out | Komusubi 1 East vs Maegashira 1 West |
| September 1992 | Day 15 | Musashimaru Koyo | Hand pull down | Sekiwake 2 West vs Sekiwake 1 West |
| July 1993 | Day 12 | Mitoizumi Masayuki | Over arm throw | Maegashira 5 West vs Sekiwake 1 West |
| September 1993 | Day 10 | Musashimaru Koyo | Frontal force out | Sekiwake 1 East vs Maegashira 1 West |
| November 1995 | Day 2 | Musashimaru Koyo | Frontal push out | Ozeki 1 East vs Maegashira 2 West |
| January 1996 | Day 8 | Musashimaru Koyo | Frontal push out | Maegashira 1 West vs Ozeki 1 West |
| July 1996 | Day 5 | Musashimaru Koyo | Frontal force out | Ozeki 2 East vs Maegashira 3 West |
| November 1996 | Day 8 | Musashimaru Koyo | Frontal force out | Maegashira 2 West vs Ozeki 1 West |
| May 1997 | Day 6 | Musashimaru Koyo | Frontal push out | Ozeki 1 East vs Maegashira 5 East |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.