Ako Mayama (真山 亜子, Mayama Ako; born November 15, 1958), previously known as Rin Mizuhara (水原 リン, Mizuhara Rin), is a Japanese voice actress. She is known for portraying young boys or scruffy old ladies. She is best known for voicing Satoshi Sugiyama, also known as Sugiyama-kun, in the Chibi Maruko-chan television anime series.
Source: “Ako Mayama”, English Wikipedia (CC BY-SA 4.0), excerpt