Head-to-head · 21 bouts
Koboyama Daizo and Tamaryu Daizo have met 21 times in recorded sumo. Koboyama Daizo leads 16–5.
Koboyama Daizo has won with: frontal force out (8), frontal push out (5), thrust down (2), frontal lift out (1).
Tamaryu Daizo has won with: over arm throw (1), thrust down (1), backward force down (1), frontal force out (1), hand pull down (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| July 1981 | Day 5 | Koboyama Daizo | Thrust down | Juryo 5 East vs Juryo 12 East |
| March 1982 | Day 10 | Tamaryu Daizo | Over arm throw | Juryo 2 East vs Maegashira 11 West |
| March 1983 | Day 11 | Koboyama Daizo | Frontal force out | Maegashira 12 West vs Maegashira 7 West |
| July 1983 | Day 8 | Koboyama Daizo | Frontal force out | Maegashira 8 East vs Maegashira 7 West |
| November 1983 | Day 3 | Koboyama Daizo | Frontal force out | Maegashira 12 West vs Maegashira 7 West |
| September 1985 | Day 10 | Tamaryu Daizo | Thrust down | Maegashira 4 East vs Komusubi 1 West |
| January 1986 | Day 2 | Tamaryu Daizo | Backward force down | Maegashira 12 West vs Maegashira 7 West |
| May 1986 | Day 7 | Koboyama Daizo | Frontal push out | Maegashira 7 East vs Maegashira 11 East |
| July 1986 | Day 13 | Koboyama Daizo | Frontal force out | Maegashira 7 East vs Maegashira 2 West |
| September 1986 | Day 2 | Tamaryu Daizo | Frontal force out | Maegashira 9 East vs Maegashira 10 West |
| January 1987 | Day 1 | Koboyama Daizo | Frontal force out | Maegashira 9 East vs Maegashira 9 West |
| January 1988 | Day 15 | Koboyama Daizo | Frontal lift out | Maegashira 8 West vs Maegashira 5 West |
| May 1988 | Day 12 | Koboyama Daizo | Frontal force out | Maegashira 11 East vs Maegashira 14 East |
| July 1988 | Day 9 | Koboyama Daizo | Frontal force out | Maegashira 7 East vs Maegashira 12 East |
| September 1988 | Day 13 | Koboyama Daizo | Frontal force out | Juryo 3 East vs Maegashira 11 West |
| November 1988 | Day 15 | Koboyama Daizo | Frontal push out | Juryo 1 West vs Maegashira 8 West |
| January 1989 | Day 13 | Koboyama Daizo | Frontal push out | Maegashira 13 West vs Maegashira 12 West |
| March 1989 | Day 11 | Koboyama Daizo | Frontal push out | Maegashira 9 East vs Maegashira 13 West |
| July 1990 | Day 7 | Koboyama Daizo | Frontal push out | Juryo 6 West vs Juryo 1 West |
| September 1990 | Day 8 | Koboyama Daizo | Thrust down | Juryo 5 East vs Juryo 8 East |
| November 1990 | Day 7 | Tamaryu Daizo | Hand pull down | Juryo 6 East vs Juryo 11 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.