Head-to-head · 14 bouts
Dewanohana Yoshitaka and Koboyama Daizo have met 14 times in recorded sumo. Dewanohana Yoshitaka leads 11–3.
Dewanohana Yoshitaka has won with: frontal force out (8), frontal push out (1), thrust down (1), over arm throw (1).
Koboyama Daizo has won with: under shoulder swing down (1), thrust down (1), frontal force out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| November 1981 | Day 10 | Dewanohana Yoshitaka | Frontal push out | Maegashira 6 East vs Maegashira 12 West |
| September 1982 | Day 2 | Dewanohana Yoshitaka | Frontal force out | Maegashira 3 West vs Sekiwake 1 West |
| March 1983 | Day 10 | Dewanohana Yoshitaka | Frontal force out | Maegashira 1 East vs Maegashira 12 West |
| May 1983 | Day 3 | Koboyama Daizo | Under shoulder swing down | Maegashira 3 East vs Sekiwake 1 West |
| September 1983 | Day 14 | Koboyama Daizo | Thrust down | Maegashira 2 East vs Sekiwake 1 West |
| May 1984 | Day 15 | Dewanohana Yoshitaka | Thrust down | Maegashira 2 West vs Komusubi 1 West |
| January 1985 | Day 2 | Dewanohana Yoshitaka | Frontal force out | Maegashira 4 East vs Maegashira 9 West |
| May 1985 | Day 15 | Dewanohana Yoshitaka | Frontal force out | Maegashira 6 East vs Maegashira 7 West |
| July 1985 | Day 8 | Dewanohana Yoshitaka | Frontal force out | Maegashira 7 West vs Maegashira 1 West |
| September 1985 | Day 13 | Dewanohana Yoshitaka | Frontal force out | Maegashira 4 West vs Komusubi 1 West |
| July 1986 | Day 11 | Dewanohana Yoshitaka | Frontal force out | Maegashira 7 East vs Maegashira 5 West |
| November 1986 | Day 10 | Dewanohana Yoshitaka | Frontal force out | Maegashira 13 East vs Maegashira 5 West |
| July 1987 | Day 12 | Dewanohana Yoshitaka | Over arm throw | Maegashira 10 East vs Maegashira 7 West |
| January 1988 | Day 6 | Koboyama Daizo | Frontal force out | Maegashira 7 West vs Maegashira 5 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.