Head-to-head · 17 bouts
Koboyama Daizo and Daijuyama Tadaaki have met 17 times in recorded sumo. Daijuyama Tadaaki leads 10–7.
Koboyama Daizo has won with: frontal force out (3), beltless armthrow (2), thrust down (1).
Daijuyama Tadaaki has won with: frontal force out (7), frontal push out (1), arm lock throw (1), beltless armthrow (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1979 | Day 6 | Koboyama Daizo | — | Makushita 20 East vs Makushita 21 East |
| March 1982 | Day 5 | Daijuyama Tadaaki | Frontal force out | Maegashira 11 West vs Maegashira 5 West |
| July 1982 | Day 9 | Daijuyama Tadaaki | Frontal push out | Maegashira 8 East vs Maegashira 11 East |
| March 1985 | Day 2 | Daijuyama Tadaaki | Frontal force out | Maegashira 9 East vs Maegashira 10 West |
| May 1985 | Day 1 | Koboyama Daizo | Frontal force out | Maegashira 6 East vs Maegashira 5 West |
| September 1985 | Day 7 | Daijuyama Tadaaki | Arm lock throw | Maegashira 3 West vs Komusubi 1 West |
| January 1986 | Day 6 | Koboyama Daizo | Frontal force out | Maegashira 12 West vs Maegashira 6 West |
| March 1986 | Day 6 | Daijuyama Tadaaki | Frontal force out | Maegashira 8 East vs Maegashira 2 West |
| May 1986 | Day 12 | Daijuyama Tadaaki | Beltless armthrow | Maegashira 11 East vs Maegashira 7 West |
| September 1986 | Day 14 | Daijuyama Tadaaki | Frontal force out | Maegashira 9 East vs Maegashira 7 West |
| September 1987 | Day 4 | Koboyama Daizo | Beltless armthrow | Maegashira 12 West vs Maegashira 7 West |
| November 1987 | Day 14 | Koboyama Daizo | Thrust down | Maegashira 4 East vs Maegashira 1 West |
| January 1988 | Day 9 | Daijuyama Tadaaki | Frontal force out | Maegashira 13 East vs Maegashira 5 West |
| September 1988 | Day 11 | Daijuyama Tadaaki | Frontal force out | Maegashira 7 East vs Maegashira 11 West |
| March 1989 | Day 9 | Koboyama Daizo | Beltless armthrow | Maegashira 9 East vs Maegashira 4 West |
| July 1989 | Day 10 | Koboyama Daizo | Frontal force out | Maegashira 12 West vs Maegashira 8 West |
| January 1990 | Day 5 | Daijuyama Tadaaki | Frontal force out | Maegashira 14 East vs Maegashira 7 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.