Two of the many fighters who have shown that a loss isn't the end are Ryoichi Taguchi and Yu Kimura. The two fighters faced each other back in October 2011 in the Strongest Korakuen, the competition to decide the mandatory challenger to Japanese champion. In these case of these two men the winner was going to fight for the Japanese Light Flyweight title then held by Masayuki Kuroda.
The fight saw both men entering with a loss on their record but their desire to earn a title fight was all they needed to risk a second.
Whilst we won't ruin the result of this bout it's worth noting two things. Firstly both men have gone on to win the Japanese national title since this bout and as we all know Taguchi has suffered a loss to Naoya Inoue, actually giving Inoue his toughest bout to date. And secondly this bout was on the same show as Shinya Iwabuchi's contest with Shamgar Koichi.
(Footage courtesy of )