The "Nishimura Kyotaro Mystery Series: Blue Train Murder Case" is an adventure game adapted from the novel of the same name by famous Japanese mystery writer Kyotaro Nishimura. Released on January 20, 1989 for the Nintendo Famicom by Irem, it was developed by TOSE.
Set on a Japanese blue train — the general term for long-distance sleeper trains in Japan, named for their all-blue exterior — the game lets players take on the roles of three different detectives investigating a murder aboard the train. By talking to witnesses and suspects and interacting with the environment, players gather clues to uncover the truth behind the case.
Notably, there are no wrong choices that lead to character death or game over; players can freely explore clues, dig deeper into suspects, and enjoy the puzzle-solving fun.
As the first entry in the Nishimura Kyotaro Railway Mystery series, this game laid the foundation for subsequent installments and attracted the attention of many mystery game fans.