Head-to-head · 12 bouts
Shiratayama Hidetoshi and Ryoga Seiko have met 12 times in recorded sumo. Shiratayama Hidetoshi leads 8–4.
Shiratayama Hidetoshi has won with: frontal force out (5), slap down (1), thrust down (1), beltless armthrow (1).
Ryoga Seiko has won with: frontal force out (2), over arm throw (1), frontal crush out (1).
| Tournament | Day | Winner | Technique | Ranks |
|---|---|---|---|---|
| March 1970 | Day 3 | Ryoga Seiko | Over arm throw | Juryo 12 East vs Juryo 13 East |
| May 1970 | Day 13 | Shiratayama Hidetoshi | Frontal force out | Juryo 6 East vs Juryo 7 West |
| July 1970 | Day 6 | Shiratayama Hidetoshi | Frontal force out | Juryo 8 East vs Juryo 12 East |
| September 1970 | Day 12 | Shiratayama Hidetoshi | Frontal force out | Juryo 6 East vs Juryo 3 West |
| November 1970 | Day 5 | Ryoga Seiko | Frontal force out | Juryo 11 West vs Juryo 4 West |
| May 1972 | Day 2 | Shiratayama Hidetoshi | Slap down | Juryo 8 West vs Juryo 4 West |
| September 1972 | Day 5 | Shiratayama Hidetoshi | Frontal force out | Juryo 6 West vs Juryo 1 West |
| November 1972 | Day 7 | Shiratayama Hidetoshi | Thrust down | Juryo 8 East vs Juryo 3 West |
| January 1973 | Day 3 | Ryoga Seiko | Frontal crush out | Juryo 2 East vs Juryo 5 East |
| March 1973 | Day 9 | Shiratayama Hidetoshi | Frontal force out | Maegashira 13 East vs Juryo 4 East |
| July 1973 | Day 9 | Shiratayama Hidetoshi | Beltless armthrow | Juryo 6 East vs Juryo 4 West |
| September 1973 | Day 9 | Ryoga Seiko | Frontal force out | Juryo 2 East vs Juryo 10 East |
Every bout between the two that is in this database (March 1958 onwards). Technique names follow NHK WORLD-JAPAN.