Hiroko Maruyama (丸山 裕子, Maruyama Hiroko; born October 22, 1946) is a Japanese voice actress from Tokyo, affiliated with Teatro Echo. She is known for portraying Gon in First Human Giatrus, Kinoppy in Paul's Miraculous Adventure, Santa Minami in Chōgattai Majutsu Robo Ginguiser, Minoru Yamada in Ojamanga Yamada-kun, Togejirou in Ninja Hattori-kun, Prince Komaro in Yattodetaman, Ryo Ishizaki in Captain Tsubasa, Mag in Choushinsei Flashman, and Robotan in Robotan.
Source: “Hiroko Maruyama”, English Wikipedia (CC BY-SA 4.0), excerpt