Head-to-head · 18 bouts
Okinoumi Ayumi and Kaisei Ichiro have met 18 times in recorded sumo. Kaisei Ichiro leads 10–8.
Okinoumi Ayumi has won with: underarm throw (3), frontal force out (3), frontal push out (1), slap down (1).
Kaisei Ichiro has won with: frontal force out (9), frontal push out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| September 2010 | Day 7 | Kaisei Ichiro | Frontal force out | Juryo 4 East vs Juryo 8 East |
| July 2011 | Day 2 | Okinoumi Ayumi | Underarm throw | Maegashira 4 East vs Maegashira 5 East |
| July 2013 | Day 12 | Okinoumi Ayumi | Frontal force out | Maegashira 12 East vs Maegashira 6 West |
| March 2014 | Day 11 | Kaisei Ichiro | Frontal force out | Maegashira 2 East vs Maegashira 3 East |
| May 2014 | Day 7 | Okinoumi Ayumi | Frontal push out | Maegashira 6 East vs Maegashira 9 West |
| November 2014 | Day 3 | Okinoumi Ayumi | Frontal force out | Maegashira 4 East vs Maegashira 7 East |
| May 2015 | Day 1 | Kaisei Ichiro | Frontal force out | Maegashira 11 East vs Maegashira 10 West |
| July 2015 | Day 5 | Kaisei Ichiro | Frontal force out | Maegashira 5 East vs Maegashira 3 West |
| January 2016 | Day 4 | Okinoumi Ayumi | Underarm throw | Maegashira 6 West vs Maegashira 3 West |
| May 2016 | Day 7 | Kaisei Ichiro | Frontal force out | Komusubi 1 East vs Komusubi 1 West |
| July 2016 | Day 10 | Kaisei Ichiro | Frontal force out | Sekiwake 1 East vs Maegashira 2 East |
| September 2016 | Day 9 | Kaisei Ichiro | Frontal force out | Komusubi 1 East vs Maegashira 1 East |
| November 2016 | Day 12 | Okinoumi Ayumi | Frontal force out | Maegashira 2 East vs Sekiwake 1 West |
| September 2017 | Day 6 | Kaisei Ichiro | Frontal force out | Maegashira 14 West vs Maegashira 13 West |
| November 2017 | Day 4 | Okinoumi Ayumi | Underarm throw | Maegashira 10 East vs Maegashira 12 East |
| March 2018 | Day 8 | Kaisei Ichiro | Frontal push out | Maegashira 6 East vs Maegashira 9 East |
| January 2019 | Day 12 | Kaisei Ichiro | Frontal force out | Maegashira 8 East vs Maegashira 4 West |
| May 2021 | Day 7 | Okinoumi Ayumi | Slap down | Maegashira 15 East vs Maegashira 12 West |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.