Head-to-head · 12 bouts
Iwashita Eiichi and Masudayama Yasuhito have met 12 times in recorded sumo. Masudayama Yasuhito leads 8–4.
Iwashita Eiichi has won with: frontal push out (3), thrust down (1).
Masudayama Yasuhito has won with: frontal push out (3), frontal force out (2), hand pull down (1), rear push out (1), slap down (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| September 1976 | Day 4 | Masudayama Yasuhito | Frontal force out | Juryo 13 East vs Juryo 6 West |
| May 1977 | Day 15 | Masudayama Yasuhito | Hand pull down | Maegashira 10 East vs Juryo 3 East |
| July 1977 | Day 8 | Masudayama Yasuhito | Frontal push out | Maegashira 13 East vs Maegashira 11 West |
| November 1977 | Day 3 | Iwashita Eiichi | Frontal push out | Maegashira 9 East vs Maegashira 13 East |
| March 1978 | Day 2 | Masudayama Yasuhito | Frontal force out | Maegashira 11 East vs Maegashira 12 West |
| September 1978 | Day 4 | Iwashita Eiichi | Frontal push out | Maegashira 13 East vs Maegashira 7 West |
| July 1979 | Day 8 | Iwashita Eiichi | Thrust down | Maegashira 9 West vs Maegashira 8 West |
| September 1979 | Day 8 | Masudayama Yasuhito | Rear push out | Maegashira 12 East vs Maegashira 13 East |
| November 1979 | Day 5 | Iwashita Eiichi | Frontal push out | Maegashira 8 West vs Maegashira 5 West |
| May 1980 | Day 12 | Masudayama Yasuhito | Frontal push out | Maegashira 8 East vs Maegashira 13 West |
| May 1981 | Day 15 | Masudayama Yasuhito | Frontal push out | Maegashira 9 East vs Maegashira 1 West |
| July 1981 | Day 7 | Masudayama Yasuhito | Slap down | Maegashira 5 East vs Maegashira 12 East |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.