Masahiko Nomi (能見 正比古 Nomi Masahiko, July 18, 1925 – October 30, 1981) was a Japanese journalist who advocated Takeji Furukawa's idea of an influence of blood type on personality. He was also known as a sumo essayist.
Source: “Masahiko Nomi”, English Wikipedia (CC BY-SA 4.0), excerpt