Head-to-head · 28 bouts
Kaio Hiroyuki and Kotooshu Katsunori have met 28 times in recorded sumo. Kotooshu Katsunori leads 16–12.
Kaio Hiroyuki has won with: frontal force out (3), arm lock throw (3), arm bar throw (2), rear push out (1), over arm throw (1).
Kotooshu Katsunori has won with: frontal force out (8), over arm throw (4), frontal crush out (3), frontal push out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| March 2005 | Day 6 | Kaio Hiroyuki | Rear push out | Komusubi 1 West vs Ozeki 1 West |
| July 2005 | Day 6 | Kotooshu Katsunori | Frontal force out | Komusubi 1 East vs Ozeki 2 West |
| November 2005 | Day 15 | Kaio Hiroyuki | Over arm throw | Sekiwake 1 East vs Ozeki 2 West |
| March 2006 | Day 10 | Kotooshu Katsunori | Over arm throw | Ozeki 2 West vs Ozeki 1 West |
| May 2006 | Day 14 | Kotooshu Katsunori | Frontal crush out | Ozeki 2 West vs Ozeki 1 West |
| July 2006 | Day 8 | Kotooshu Katsunori | Frontal force out | Ozeki 2 East vs Ozeki 2 West |
| November 2006 | Day 10 | Kotooshu Katsunori | Over arm throw | Ozeki 3 West vs Ozeki 1 West |
| January 2007 | Day 14 | Kaio Hiroyuki | Frontal force out | Ozeki 1 East vs Ozeki 2 East |
| March 2007 | Day 9 | Kotooshu Katsunori | Frontal force out | Ozeki 2 East vs Ozeki 2 West |
| May 2007 | Day 15 | Kaio Hiroyuki | Arm bar throw | Ozeki 2 East vs Ozeki 1 West |
| July 2007 | Day 9 | Kaio Hiroyuki | Arm bar throw | Ozeki 1 East vs Ozeki 2 East |
| January 2008 | Day 15 | Kotooshu Katsunori | Frontal force out | Ozeki 2 East vs Ozeki 2 West |
| May 2008 | Day 8 | Kotooshu Katsunori | Frontal force out | Ozeki 2 West vs Ozeki 1 West |
| July 2008 | Day 14 | Kaio Hiroyuki | Arm lock throw | Ozeki 1 East vs Ozeki 2 East |
| September 2008 | Day 10 | Kaio Hiroyuki | Frontal force out | Ozeki 2 East vs Ozeki 1 West |
| January 2009 | Day 15 | Kotooshu Katsunori | Frontal force out | Ozeki 2 East vs Ozeki 2 West |
| March 2009 | Day 12 | Kotooshu Katsunori | Frontal force out | Ozeki 1 East vs Ozeki 2 East |
| May 2009 | Day 10 | Kaio Hiroyuki | Arm lock throw | Ozeki 1 East vs Ozeki 2 East |
| July 2009 | Day 9 | Kotooshu Katsunori | Frontal force out | Ozeki 2 East vs Ozeki 1 West |
| September 2009 | Day 10 | Kaio Hiroyuki | Frontal push out | Ozeki 1 East vs Ozeki 2 West |
| November 2009 | Day 10 | Kaio Hiroyuki | Frontal push down | Ozeki 1 East vs Ozeki 2 West |
| January 2010 | Day 11 | Kotooshu Katsunori | Frontal crush out | Ozeki 1 East vs Ozeki 2 West |
| March 2010 | Day 15 | Kotooshu Katsunori | Frontal crush out | Ozeki 2 East vs Ozeki 1 West |
| May 2010 | Day 15 | Kaio Hiroyuki | Frontal force out | Ozeki 2 West vs Ozeki 1 West |
| July 2010 | Day 10 | Kotooshu Katsunori | Over arm throw | Ozeki 2 East vs Ozeki 3 West |
| September 2010 | Day 10 | Kotooshu Katsunori | Over arm throw | Ozeki 2 West vs Ozeki 1 West |
| January 2011 | Day 14 | Kaio Hiroyuki | Arm lock throw | Ozeki 1 East vs Ozeki 2 East |
| July 2011 | Day 10 | Kotooshu Katsunori | Frontal push out | Ozeki 2 East vs Ozeki 2 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.