sentences:  In 1965, he retired from the company and started working as an independent writer.Mayumura's first book, the SF novel "Moeru Keisha" (), was published by Tōto Shobo in the same year.In 1979, he won the seventh Izumi Kyōka Prize for Literature and the Seiun Award for his novel "Shōmetsu no Kōrin", which is the representative work in his ""Shiseikan" series".