Shigure "The Prodigy of Swords and Weapons" Kousaka

For every strong disciple, there is a great master standing behind them. They instruct, guide and, ultimately, push their disciplies to their limits to achieve their next level of martial prowess. This time, lets step away from the students and focus on the great martial arts instructors in anime.

The fundoshi is traditional Japanese underwear for adult males. You shouldn't be shocked how anime uses that to its advantage, as 10 characters show off their assets, for better, or for worse!