Japan
Kotaro Sekine
9-2-1 8 KO · 2021–2025
Kotaro Sekine is a professional boxer from Japan, born Dec 11, 1997. Record 9-2-1 with 8 knockouts over 2021–2025. Kotaro Sekine last fought Izuki Tomioka on Jun 30, 2025 and lost by TD over 6 rounds.
Also: 関根幸太朗
BornDec 11, 1997
Country🇯🇵 Japan
DebutSep 22, 2021
Career2021–2025
Rounds boxed43
KO share89%
Born inKuki, Japan
Boxerbook rating1577 ± 177 · inactive since Jun 2025Why here ›
Confirmed bouts11 of 12 · 11 official
Record and next fight
Record
9-2-1, 8 KOs · 2021–2025
Next fight
No next fight confirmed
Last result
The record
12 bouts, 2021–2025, newest first. Records under each bout are both boxers going in.
Bouts by source: Wikipedia (ja) · 12, Japan Boxing Commission — 試合報告書 · 11
Ratings now
Not in any current ranking.
World titles
No world title reigns recorded.
Facts
- What is Kotaro Sekine's record?
- Kotaro Sekine's professional record is 9-2-1 with 8 knockouts.
- When is Kotaro Sekine's next fight?
- No next fight is confirmed as of 18 Oct 2026.
- Who did Kotaro Sekine fight last?
- Kotaro Sekine last fought Izuki Tomioka on Jun 30, 2025 and lost by TD over 6 rounds.
Promoter
Sources
Boxerbook ID 19660 · permanent link boxerbook.com/id/19660. Wikidata (CC0), English Wikipedia (CC BY-SA). Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.