Head-to-head · 13 bouts
Koboyama Daizo and Onishiki Ittetsu have met 13 times in recorded sumo. Onishiki Ittetsu leads 7–6.
Koboyama Daizo has won with: frontal push out (3), slap down (2), frontal force out (1).
Onishiki Ittetsu has won with: over arm throw (2), frontal force out (1), thrust down (1), rear push out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| January 1982 | Day 1 | Onishiki Ittetsu | Over arm throw | Maegashira 9 West vs Maegashira 6 West |
| July 1982 | Day 3 | Koboyama Daizo | Frontal push out | Maegashira 11 East vs Maegashira 4 West |
| September 1982 | Day 3 | Onishiki Ittetsu | fusen | Maegashira 8 East vs Maegashira 3 West |
| September 1984 | Day 7 | Koboyama Daizo | Slap down | Maegashira 10 West vs Maegashira 7 West |
| March 1985 | Day 7 | Onishiki Ittetsu | Frontal force out | Maegashira 10 East vs Maegashira 10 West |
| November 1985 | Day 12 | Koboyama Daizo | Frontal push out | Maegashira 7 East vs Maegashira 1 West |
| May 1986 | Day 3 | Koboyama Daizo | Slap down | Maegashira 11 East vs Maegashira 13 West |
| July 1986 | Day 14 | Onishiki Ittetsu | Thrust down | Maegashira 7 East vs Maegashira 9 East |
| November 1986 | Day 11 | Koboyama Daizo | Frontal force out | Maegashira 11 East vs Maegashira 13 East |
| March 1987 | Day 4 | Onishiki Ittetsu | Over arm throw | Maegashira 6 East vs Maegashira 11 East |
| May 1987 | Day 15 | Onishiki Ittetsu | Rear push out | Maegashira 12 East vs Maegashira 1 West |
| July 1987 | Day 5 | Onishiki Ittetsu | Underarm throw | Maegashira 7 West vs Maegashira 3 West |
| September 1987 | Day 7 | Koboyama Daizo | Frontal push out | Maegashira 11 East vs Maegashira 12 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.