Hagure Shocho no Satsujin Kyuko 3 (2018)

Hagure Shocho no Satsujin Kyuko 3 2018 / はぐれ署長の殺人急行3 2018 / Izu Shuzenji Meikyuu Daiya , Hagure Shochou no Satsujin Kyuukou 3 , はぐれしょちょうのさつじんきゅうこう3 , 伊豆・修善寺迷宮ダイヤ

Hokuto Tetsutaro was a former elite commissioner at the National Police Agency. He was then demoted to the chief police position at a police station in the province. He is a train otaku and loves riding trains all across the country. He solves murder cases using his insight and knowledge about trains. (Source: AsianWiki)