Kusuo Eguchi (10-3, 4) vs Katsuaki Eguchi (10-4, 1)
Through the history of boxing we have often seen brothers fighting, and supporting each other, cheering each other on in their fights. One peculiar oddity however is the Eguchi brothers, Kusuo Eguchi and Katsuaki Eguchi, who did support each other for the most part, but bizarrely fought each other in a bout for the then vacant Japanese Minimumweight title, way back in 1993. From what we understand this is the only time two brothers have faced off in a title bout, and it's clear from various things during the bout that the two men had no dislike of each other, and at the end of the day they knew they were brothers. Despite that the bout was incredibly intense and exciting.