Head-to-head · 28 bouts
Koboyama Daizo and Itai Keisuke have met 28 times in recorded sumo. Itai Keisuke leads 15–13.
Koboyama Daizo has won with: slap down (5), thrust down (3), frontal push out (2), frontal force out (1), underarm throw (1).
Itai Keisuke has won with: frontal push out (6), thrust down (4), slap down (3), arm lock throw (1), frontal thrust out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1982 | Day 9 | Itai Keisuke | Frontal push out | Juryo 13 East vs Juryo 1 West |
| January 1983 | Day 6 | Koboyama Daizo | Frontal force out | Juryo 3 East vs Juryo 6 East |
| March 1983 | Day 1 | Itai Keisuke | Arm lock throw | Maegashira 13 East vs Maegashira 12 West |
| May 1983 | Day 13 | Koboyama Daizo | Thrust down | Maegashira 3 East vs Maegashira 5 East |
| July 1983 | Day 14 | Itai Keisuke | Frontal push out | Maegashira 8 West vs Maegashira 7 West |
| September 1983 | Day 6 | Koboyama Daizo | Underarm throw | Maegashira 2 East vs Maegashira 6 East |
| January 1984 | Day 14 | Itai Keisuke | Thrust down | Maegashira 7 West vs Sekiwake 1 West |
| July 1984 | Day 3 | Koboyama Daizo | Rear push out | Maegashira 14 East vs Maegashira 7 West |
| September 1984 | Day 15 | Itai Keisuke | Frontal push out | Maegashira 7 West vs Maegashira 2 West |
| March 1985 | Day 15 | Itai Keisuke | Slap down | Maegashira 8 East vs Maegashira 10 West |
| July 1985 | Day 13 | Koboyama Daizo | Frontal push out | Maegashira 7 East vs Maegashira 7 West |
| March 1986 | Day 4 | Itai Keisuke | Frontal thrust out | Maegashira 8 East vs Maegashira 13 West |
| May 1986 | Day 2 | Itai Keisuke | Thrust down | Maegashira 11 East vs Maegashira 6 West |
| September 1986 | Day 15 | Itai Keisuke | Thrust down | Maegashira 9 East vs Maegashira 12 East |
| January 1987 | Day 13 | Itai Keisuke | Frontal push out | Maegashira 10 West vs Maegashira 9 West |
| September 1987 | Day 9 | Koboyama Daizo | Thrust down | Maegashira 10 East vs Maegashira 12 West |
| January 1988 | Day 14 | Koboyama Daizo | Slap down | Maegashira 10 East vs Maegashira 5 West |
| May 1988 | Day 6 | Itai Keisuke | Slap down | Maegashira 11 East vs Maegashira 7 West |
| July 1988 | Day 13 | Koboyama Daizo | Slap down | Maegashira 7 East vs Maegashira 2 West |
| September 1988 | Day 1 | Itai Keisuke | Frontal push out | Maegashira 11 East vs Maegashira 11 West |
| November 1988 | Day 11 | Itai Keisuke | Frontal push out | Maegashira 8 West vs Maegashira 4 West |
| January 1989 | Day 10 | Koboyama Daizo | Thrust down | Maegashira 13 West vs Maegashira 10 West |
| March 1989 | Day 15 | Koboyama Daizo | Frontal push out | Maegashira 7 East vs Maegashira 9 East |
| May 1989 | Day 7 | Itai Keisuke | Slap down | Maegashira 3 West vs Komusubi 1 West |
| July 1989 | Day 12 | Itai Keisuke | Thrust down | Maegashira 8 East vs Maegashira 12 West |
| September 1989 | Day 2 | Koboyama Daizo | Slap down | Maegashira 5 East vs Maegashira 10 East |
| November 1989 | Day 11 | Koboyama Daizo | Slap down | Maegashira 9 East vs Maegashira 12 West |
| January 1990 | Day 11 | Koboyama Daizo | Slap down | Maegashira 3 East vs Maegashira 14 East |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.