Head-to-head · 23 bouts
Kotoryu Hiroo and Kaiho Ryoji have met 23 times in recorded sumo. Kaiho Ryoji leads 13–10.
Kotoryu Hiroo has won with: frontal force out (6), frontal lift out (2), twisting backward knee trip (1), frontal push down (1).
Kaiho Ryoji has won with: rear push out (5), slap down (1), head lock throw (1), underarm throw (1), hand pull down (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| May 1998 | Day 9 | Kotoryu Hiroo | Frontal lift out | Maegashira 16 East vs Maegashira 10 West |
| July 1998 | Day 1 | Kotoryu Hiroo | Frontal force out | Maegashira 14 East vs Maegashira 13 West |
| September 1998 | Day 7 | Kotoryu Hiroo | Frontal force out | Maegashira 10 East vs Maegashira 6 West |
| March 1999 | Day 12 | Kotoryu Hiroo | Frontal lift out | Maegashira 12 West vs Maegashira 10 West |
| May 1999 | Day 3 | Kaiho Ryoji | Rear push out | Maegashira 10 East vs Maegashira 8 West |
| September 1999 | Day 10 | Kaiho Ryoji | Slap down | Maegashira 9 East vs Maegashira 10 West |
| May 2000 | Day 1 | Kotoryu Hiroo | Frontal force out | Maegashira 5 East vs Maegashira 5 West |
| July 2000 | Day 1 | Kaiho Ryoji | Head lock throw | Maegashira 6 East vs Maegashira 6 West |
| September 2000 | Day 13 | Kaiho Ryoji | Underarm throw | Maegashira 8 East vs Maegashira 1 West |
| November 2000 | Day 13 | Kotoryu Hiroo | Twisting backward knee trip | Maegashira 9 East vs Maegashira 11 East |
| July 2001 | Day 1 | Kaiho Ryoji | Hand pull down | Maegashira 10 East vs Maegashira 10 West |
| September 2001 | Day 5 | Kotoryu Hiroo | Frontal force out | Maegashira 4 East vs Maegashira 7 West |
| May 2002 | Day 1 | Kaiho Ryoji | Rear push down | Maegashira 8 East vs Maegashira 8 West |
| November 2002 | Day 5 | Kaiho Ryoji | Frontal force out | Maegashira 8 East vs Maegashira 6 West |
| March 2003 | Day 1 | Kotoryu Hiroo | Frontal force out | Maegashira 5 East vs Maegashira 5 West |
| July 2003 | Day 3 | Kaiho Ryoji | Beltless armthrow | Maegashira 8 East vs Maegashira 5 West |
| September 2003 | Day 13 | Kaiho Ryoji | Rear push out | Maegashira 3 East vs Maegashira 10 West |
| March 2004 | Day 12 | Kotoryu Hiroo | Frontal force out | Maegashira 16 West vs Maegashira 10 West |
| May 2004 | Day 6 | Kaiho Ryoji | Rear push out | Maegashira 9 East vs Maegashira 12 East |
| July 2004 | Day 10 | Kaiho Ryoji | Rear push out | Maegashira 3 East vs Maegashira 8 West |
| September 2004 | Day 4 | Kotoryu Hiroo | Frontal push down | Maegashira 8 East vs Maegashira 9 West |
| November 2004 | Day 8 | Kaiho Ryoji | Frontal push out | Maegashira 9 East vs Maegashira 13 East |
| January 2005 | Day 9 | Kaiho Ryoji | Rear push out | Maegashira 7 West vs Maegashira 6 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.