Head-to-head · 15 bouts
Kotomitsuki Keiji and Iwakiyama Ryuta have met 15 times in recorded sumo. Iwakiyama Ryuta leads 8–7.
Kotomitsuki Keiji has won with: frontal force out (2), over arm throw (2), pulling underarm throw (1), arm lock throw (1).
Iwakiyama Ryuta has won with: frontal push out (4), frontal force out (3), slap down (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| January 2003 | Day 13 | Iwakiyama Ryuta | Frontal force out | Maegashira 5 West vs Sekiwake 1 West |
| March 2003 | Day 11 | Kotomitsuki Keiji | fusen | Maegashira 6 East vs Sekiwake 1 West |
| July 2003 | Day 6 | Iwakiyama Ryuta | Frontal push out | Maegashira 10 East vs Maegashira 13 East |
| November 2003 | Day 12 | Iwakiyama Ryuta | Frontal push out | Maegashira 1 West vs Komusubi 1 West |
| March 2004 | Day 15 | Kotomitsuki Keiji | Frontal force out | Maegashira 5 West vs Sekiwake 1 West |
| July 2004 | Day 8 | Kotomitsuki Keiji | Pulling underarm throw | Komusubi 1 East vs Maegashira 1 West |
| September 2004 | Day 11 | Iwakiyama Ryuta | Frontal push out | Maegashira 2 East vs Komusubi 1 West |
| November 2004 | Day 12 | Iwakiyama Ryuta | Slap down | Komusubi 1 East vs Maegashira 3 East |
| January 2005 | Day 11 | Kotomitsuki Keiji | Arm lock throw | Komusubi 1 East vs Maegashira 1 East |
| September 2005 | Day 6 | Iwakiyama Ryuta | Frontal push out | Komusubi 1 East vs Maegashira 4 East |
| November 2005 | Day 4 | Kotomitsuki Keiji | Frontal force out | Maegashira 4 West vs Sekiwake 1 West |
| January 2006 | Day 13 | Iwakiyama Ryuta | Frontal force out | Sekiwake 1 East vs Maegashira 5 East |
| March 2006 | Day 2 | Iwakiyama Ryuta | Frontal force out | Maegashira 3 West vs Sekiwake 1 West |
| November 2006 | Day 7 | Kotomitsuki Keiji | Over arm throw | Maegashira 1 West vs Sekiwake 1 West |
| July 2009 | Day 5 | Kotomitsuki Keiji | Over arm throw | Maegashira 3 East vs Ozeki 2 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.