10 rounds

Royal
Kobayashi
VS
Harada
Ushiwakamaru

Kobayashi · UD 10/10

Updated Oct 14, 2026 · Sources: English Wikipedia, Wikipedia (ja)

Dec 21, 1975 · Japan

Kobayashi going in19-1-0

Ushiwakamaru going in34-18-15

Confirmation✓✓ two sources

MethodUD

Round10 of 10

Sources

English Wikipedia
side a · observed 2026-10-11
en.wikipedia.org/wiki/Royal_Kobayashi

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Wikipedia (ja)
side b · observed 2026-10-12
ja.wikipedia.org/wiki/牛若丸原田

✓

Wikipedia (ja)
side a · observed 2026-10-12
ja.wikipedia.org/wiki/ロイヤル小林

✓