Ikuo Shinmasu was born in Kamai in Kaminosekicho, Kumage-gun in Yamaguchi Prefecture in 1950. After working at Teikoku Sanso Ltd. (currently AIR LIQUIDE Japan Ltd.), a foreign-affiliated company in Kobe, he retired and started his “second” college life at Nihon University as a history major. He lives in the city of Zushi in Kanagawa Prefecture with his wife and eldest son. He likes cooking and karaoke.