5 rounds

Ken
Koibuchi
VS
Yusaku
Sekishima

Sekishima · UD 5/5

Updated Oct 14, 2026 · Sources: Wikipedia (ja), Japan Boxing Commission — 試合報告書

Nov 4, 2018 · Korakuen Hall, 🇯🇵

Koibuchi going in—

Sekishima going in6-1-0

Confirmationofficial ★

MethodUD

Round5 of 5

Notes2018年度東日本スーパーフェザー級新人王決勝戦

Event

DateNov 4, 2018

VenueKorakuen Hall

Country🇯🇵 Japan

Wikipedia (ja)
side b · observed 2026-10-12
ja.wikipedia.org/wiki/関島優作

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Japan Boxing Commission — 試合報告書
side neutral · observed 2026-10-14
jbc.or.jp/result/#no=2018110401

✓