Naniwa Kinyuu Den: Minami no Teiou
難波金融伝 ミナミの帝王
The story centers around Ginjirou Manda, a loan shark who charges toichi — 10% more interest every 10 days, or 365% every year. Thanks to his unrelenting money-collecting tactics, he is feared as Minami no Oni or the Demon of Osaka's Minami business district.
(Source: ANN)