It was Mr. Masahiko NOMI, a journalist hometown, that made the present Japanese blood-type boom. He wrote more than ten books and these became the best sellers or long sellers. After his death in 1981, his son, Mr. Toshitaka NOMI took over.
Japanese edition is available now.
The book was introduced by two major private TV stations in Japan. Not only Japanese but English and French psychologists studied relation between blood type and personality. A mailing list for blood-type personality research and its many applications. There are only four blood types. As for relation between blood type and personality, results differs by questionnaires.