Head-to-head · 18 bouts
Sasshunada Yasutaka and Koboyama Daizo have met 18 times in recorded sumo. Koboyama Daizo leads 10–8.
Sasshunada Yasutaka has won with: frontal push out (5), frontal force out (2), hand pull down (1).
Koboyama Daizo has won with: thrust down (2), frontal push out (2), frontal force out (2), frontal crush out (1), frontal thrust out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| September 1986 | Day 5 | Sasshunada Yasutaka | Frontal push out | Maegashira 9 East vs Maegashira 11 West |
| November 1986 | Day 6 | Koboyama Daizo | Thrust down | Maegashira 6 East vs Maegashira 13 East |
| January 1987 | Day 11 | Koboyama Daizo | Thrust down | Maegashira 11 East vs Maegashira 9 West |
| September 1987 | Day 1 | Koboyama Daizo | Frontal push out | Maegashira 13 East vs Maegashira 12 West |
| November 1987 | Day 8 | Sasshunada Yasutaka | Frontal push out | Maegashira 4 East vs Maegashira 5 West |
| January 1988 | Day 1 | Koboyama Daizo | Frontal crush out | Maegashira 6 East vs Maegashira 5 West |
| March 1988 | Day 1 | Koboyama Daizo | Frontal push out | Maegashira 2 East vs Maegashira 1 West |
| May 1988 | Day 13 | Sasshunada Yasutaka | Frontal push out | Maegashira 10 East vs Maegashira 11 East |
| July 1988 | Day 14 | Sasshunada Yasutaka | Frontal force out | Maegashira 7 East vs Maegashira 5 West |
| September 1988 | Day 8 | Koboyama Daizo | Frontal force out | Maegashira 6 East vs Maegashira 11 West |
| November 1988 | Day 1 | Sasshunada Yasutaka | Hand pull down | Maegashira 9 West vs Maegashira 8 West |
| January 1989 | Day 12 | Koboyama Daizo | Frontal thrust out | Maegashira 13 West vs Maegashira 4 West |
| July 1989 | Day 9 | Sasshunada Yasutaka | Frontal push out | Maegashira 9 East vs Maegashira 12 West |
| September 1989 | Day 7 | Koboyama Daizo | Beltless armthrow | Maegashira 10 East vs Maegashira 14 East |
| March 1990 | Day 6 | Koboyama Daizo | Rear push down | Juryo 1 East vs Juryo 8 East |
| May 1990 | Day 11 | Sasshunada Yasutaka | Frontal push out | Juryo 6 East vs Juryo 3 West |
| July 1990 | Day 10 | Sasshunada Yasutaka | Frontal force out | Juryo 10 West vs Juryo 6 West |
| September 1990 | Day 9 | Koboyama Daizo | Frontal force out | Juryo 8 East vs Juryo 5 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.