Head-to-head · 13 bouts
Iwashita Eiichi and Zaonishiki Toshimasa have met 13 times in recorded sumo. Zaonishiki Toshimasa leads 7–6.
Iwashita Eiichi has won with: frontal push out (3), frontal push down (2), slap down (1).
Zaonishiki Toshimasa has won with: frontal push out (2), slap down (1), rear push out (1), underarm throw (1), frontal force out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1977 | Day 1 | Iwashita Eiichi | Frontal push down | Juryo 3 East vs Juryo 3 West |
| November 1977 | Day 15 | Iwashita Eiichi | Frontal push out | Maegashira 13 East vs Juryo 2 West |
| May 1978 | Day 1 | Zaonishiki Toshimasa | Frontal push out | Juryo 7 East vs Juryo 7 West |
| November 1978 | Day 6 | Zaonishiki Toshimasa | Slap down | Juryo 5 East vs Juryo 6 East |
| January 1979 | Day 6 | Zaonishiki Toshimasa | Rear push out | Juryo 2 East vs Maegashira 13 West |
| March 1979 | Day 12 | Zaonishiki Toshimasa | Underarm throw | Maegashira 12 East vs Juryo 3 East |
| July 1979 | Day 14 | Iwashita Eiichi | Slap down | Maegashira 10 West vs Maegashira 9 West |
| November 1979 | Day 15 | Zaonishiki Toshimasa | Frontal force out | Maegashira 8 East vs Maegashira 8 West |
| March 1980 | Day 6 | Iwashita Eiichi | Frontal push down | Maegashira 8 East vs Maegashira 11 East |
| May 1980 | Day 7 | Zaonishiki Toshimasa | Over arm throw | Maegashira 4 East vs Maegashira 8 East |
| July 1980 | Day 6 | Iwashita Eiichi | Frontal push out | Maegashira 9 West vs Maegashira 5 West |
| May 1981 | Day 5 | Iwashita Eiichi | Frontal push out | Maegashira 9 East vs Maegashira 6 West |
| July 1981 | Day 3 | Zaonishiki Toshimasa | Frontal push out | Maegashira 12 East vs Maegashira 10 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.