sentences:  While working at this company, he wrote short novels and submitted them to contests in commercial literary magazines.In 1960, he joined the SF fanzine "Uchūjin".In 1961, he won the Best Story prize in the 1st Kūsō-Kagaku Shōsetsu Contest (later the Hayakawa SF Contest) for his novel "Kakyū Aidea-man (Junior Idea-Man)" and made debut in the S-F Magazine by this work.