Kagemaru made his manga debut in 1957 with 'Monster Baron' (kashihon) His manga career spanned over 5 decades and he published a total of 247 works! One of his greatest successes is undoubtably 'Waru' (Bad) [Wal] on a screenplay by Hisao Maki. Horror Museum was published as a 16pg short (horror) story in Shonen King in 1967 and to my knowledge never reissued
