関塚 · Sandanme · Tagonoura stable · active
| Highest rank | Sandanme |
| Stable | Tagonoura stable |
| From | Aichi-ken, Komaki-shi |
| Born | 1997-04-21 |
| Height | 183.5 cm |
| Weight | 128.5 kg |
| First tournament | March 2013 |
Sekizuka has fought 536 recorded bouts, winning 231 and losing 305 — a winning rate of 43.1%.
| Technique | Japanese | Wins | Share |
|---|---|---|---|
| Over arm throw | 上手投げ | 67 | 29.0% |
| Frontal force out | 寄り切り | 41 | 17.7% |
| Slap down | 叩き込み | 32 | 13.9% |
| Underarm throw | 下手投げ | 13 | 5.6% |
| Thrust down | 突き落とし | 12 | 5.2% |
| Under shoulder swing down | 肩すかし | 12 | 5.2% |
| Frontal crush out | 寄り倒し | 10 | 4.3% |
| Beltless armthrow | 掬い投げ | 8 | 3.5% |
Counted from his winning bouts in this database. English names follow NHK WORLD-JAPAN. All 87 techniques →
| Opponent | Bouts | Won | Lost |
|---|---|---|---|
| Terumichi Ryo | 11 | 5 | 6 |
| Miyakojima Motoharu | 6 | 1 | 5 |
| Kototaiga | 6 | 4 | 2 |
| Kaikoki Yusuke | 5 | 1 | 4 |
| Moriurara | 5 | 0 | 5 |
| Tenkoyama | 5 | 3 | 2 |
| Shinyashiki | 5 | 1 | 4 |
| Souga | 5 | 2 | 3 |
| Tournament | Rank | Record |
|---|---|---|
| July 2026 | Jonidan 44 West | 4–3 |
| May 2026 | Jonidan 8 West | 2–5 |
| March 2026 | Jonidan 31 West | 4–3 |
| January 2026 | Jonidan 5 East | 3–4 |
| November 2025 | Jonidan 41 East | 5–2 |
| September 2025 | Jonidan 9 East | 2–5 |
| July 2025 | Jonidan 29 East | 4–3 |
| May 2025 | Jonidan 1 East | 3–4 |
| March 2025 | Sandanme 62 West | 3–4 |
| January 2025 | Jonidan 1 East | 4–3 |
| November 2024 | Sandanme 44 East | 1–6 |
| September 2024 | Sandanme 11 East | 1–6 |
| July 2024 | Sandanme 66 West | 6–1 |
| May 2024 | Sandanme 86 West | 4–3 |
| March 2024 | Sandanme 73 East | 3–4 |
The Japanese side of this site carries seven pages on Sekizuka: 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.