Kyotaro Nishimura (pseudonym of Kihachiro Yajima, born 6 September 1930 in Tokyo, Japan) is a Japanese writer of mystery stories. Nishimura is best known for his "train series" mysteries. He won the Mystery Writers of Japan Award in 1981 for The Terminal Murder Case.
Four murder mysteries taking place in four tourists-attracting hot springs, two of the mysteries are well written, surprising and intriguing, the other two are just so-so. so 3.5 stars.