Head-to-head · 13 bouts
Kotokasuga Keigo and Masatsukasa Koshin have met 13 times in recorded sumo. Masatsukasa Koshin leads 9–4.
Kotokasuga Keigo has won with: slap down (1), hand pull down (1), beltless armthrow (1), over arm throw (1).
Masatsukasa Koshin has won with: frontal push out (3), frontal force out (3), rear lift out (1), over arm throw (1), rear push out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 2005 | Day 6 | Kotokasuga Keigo | Slap down | Makushita 1 West vs Juryo 13 West |
| September 2005 | Day 1 | Masatsukasa Koshin | Frontal push out | Juryo 11 East vs Juryo 10 West |
| January 2006 | Day 12 | Kotokasuga Keigo | Hand pull down | Juryo 14 West vs Juryo 12 West |
| March 2006 | Day 2 | Masatsukasa Koshin | Frontal push out | Makushita 2 East vs Makushita 2 West |
| September 2007 | Day 5 | Masatsukasa Koshin | Frontal force out | Juryo 10 East vs Juryo 7 West |
| November 2007 | Day 6 | Masatsukasa Koshin | Rear lift out | Juryo 8 West vs Juryo 6 West |
| March 2008 | Day 14 | Masatsukasa Koshin | Over arm throw | Juryo 3 East vs Juryo 9 East |
| May 2009 | Day 9 | Kotokasuga Keigo | Beltless armthrow | Juryo 2 East vs Juryo 5 West |
| July 2009 | Day 7 | Masatsukasa Koshin | Frontal force out | Juryo 3 East vs Juryo 7 East |
| November 2009 | Day 14 | Kotokasuga Keigo | Over arm throw | Juryo 1 East vs Juryo 6 West |
| March 2010 | Day 6 | Masatsukasa Koshin | Frontal force out | Juryo 2 East vs Juryo 6 East |
| May 2010 | Day 10 | Masatsukasa Koshin | Frontal push out | Juryo 5 East vs Juryo 2 West |
| July 2010 | Day 11 | Masatsukasa Koshin | Rear push out | Juryo 1 East vs Juryo 3 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.