康誠 · Jonidan · Hidenoyama stable · active
| Highest rank | Jonidan |
| Stable | Hidenoyama stable |
| From | Saga-ken, Takeo-shi |
| Born | 2008-08-14 |
| Height | 166 cm |
| Weight | 80.8 kg |
| First tournament | May 2024 |
The ring name is written 康誠. Taken character by character:
| 康 | health, ease |
| 誠 | sincerity |
These are the dictionary meanings of the characters, not a statement about why this particular name was chosen — that is the stablemaster’s business, and we do not guess at it. How ring names are put together →
Kosei has fought 84 recorded bouts, winning 46 and losing 38 — a winning rate of 54.8%.
| Technique | Japanese | Wins | Share |
|---|---|---|---|
| Leg pick | 足取り | 11 | 23.9% |
| Frontal force out | 寄り切り | 9 | 19.6% |
| Frontal crush out | 寄り倒し | 5 | 10.9% |
| Rear push out | 送り出し | 4 | 8.7% |
| Underarm throw | 下手投げ | 3 | 6.5% |
| Under shoulder swing down | 肩すかし | 3 | 6.5% |
| Thrust down | 突き落とし | 2 | 4.3% |
| Outside leg trip | 外掛け | 1 | 2.2% |
Counted from his winning bouts in this database. English names follow NHK WORLD-JAPAN. All 87 techniques →
| Opponent | Bouts | Won | Lost |
|---|---|---|---|
| Amidaishin | 3 | 2 | 1 |
| Anzakura | 3 | 1 | 2 |
| Wakahomura | 3 | 1 | 2 |
| Teraosho | 3 | 3 | 0 |
| Miyafuji | 2 | 0 | 2 |
| Gokishin | 2 | 1 | 1 |
| Amamidake | 2 | 2 | 0 |
| Watatani | 2 | 0 | 2 |
| Tournament | Rank | Record |
|---|---|---|
| July 2026 | Jonidan 25 East | 3–4 |
| May 2026 | Jonidan 48 West | 4–3 |
| March 2026 | Jonidan 93 West | 5–2 |
| January 2026 | Jonidan 23 East | 0–0–7 |
| November 2025 | Jonidan 51 East | 4–3 |
| September 2025 | Jonidan 95 West | 5–2 |
| July 2025 | Jonidan 78 West | 3–4 |
| May 2025 | Jonidan 50 East | 3–4 |
| March 2025 | Jonidan 22 West | 3–4 |
| January 2025 | Jonidan 46 West | 4–3 |
| November 2024 | Jonidan 83 West | 5–2 |
| September 2024 | Jonidan 76 East | 3–4 |
| July 2024 | Jonokuchi 15 West | 4–3 |
The Japanese side of this site carries seven pages on Kosei: tournament-by-tournament results, every bout he has fought, head-to-head records against all opponents, a breakdown of his winning techniques, a reading of his fighting style, and his records.