Meiji Kaika: Shinjuro Tanteicho

Set during the early Meiji era, Private Detective Shinjuro Yuki returns to Japan from abroad. Trusted by the Tokyo Metropolitan Police Department, Detective Yuki attempts to solve some strange cases that have taken place. While investigating, he meets Rie, the daughter of a powerful business man, who takes an interest in him.
(Source: AsianWiki)
~~ Adapted from novel "Meiji Kaika Ango Torimonocho" (明治開化 安吾捕物帖) by Sakaguchi Ango (坂口安吾).