Yamikin Ushijima-kun

This drama depicts the harsh reality of those at the bottom of society through the eyes of the loanshark Ushijima. He is the head of Kaukau Finance which is a ruthless black market lending operation, charging as much as 50% interest every ten days.
~~ Adapted form the manga "Ushijima the Loan Shark" (闇金ウシジマくん) by Manabe Shohei (真鍋昌平).