Head-to-head · 12 bouts
Kotochitose Kosei and Washuyama Yoshikazu have met 12 times in recorded sumo. they are level at 6–6.
Kotochitose Kosei has won with: frontal force out (5), frontal push out (1).
Washuyama Yoshikazu has won with: frontal push out (3), frontal crush out (1), frontal force out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| September 1981 | Day 1 | Washuyama Yoshikazu | Frontal push out | Maegashira 5 East vs Maegashira 4 West |
| March 1982 | Day 3 | Kotochitose Kosei | Frontal force out | Juryo 10 East vs Juryo 4 West |
| May 1982 | Day 12 | Washuyama Yoshikazu | Frontal crush out | Juryo 6 East vs Juryo 9 East |
| July 1982 | Day 15 | Washuyama Yoshikazu | Frontal push out | Juryo 10 East vs Juryo 12 East |
| March 1983 | Day 7 | Kotochitose Kosei | Frontal force out | Juryo 3 East vs Juryo 6 West |
| September 1983 | Day 4 | Kotochitose Kosei | Frontal force out | Juryo 9 West vs Juryo 3 West |
| November 1983 | Day 8 | Washuyama Yoshikazu | Frontal push out | Juryo 1 East vs Juryo 5 West |
| January 1984 | Day 15 | Kotochitose Kosei | Frontal force out | Maegashira 11 East vs Juryo 2 East |
| March 1984 | Day 8 | Kotochitose Kosei | Frontal force out | Juryo 2 East vs Juryo 4 East |
| November 1984 | Day 10 | Kotochitose Kosei | Frontal push out | Juryo 1 East vs Juryo 10 West |
| January 1985 | Day 15 | Washuyama Yoshikazu | fusen | Juryo 5 East vs Juryo 7 East |
| November 1985 | Day 10 | Washuyama Yoshikazu | Frontal force out | Juryo 7 East vs Juryo 11 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.