Ryota Yamasato (Japanese: 山里亮太, Hepburn: Yamasato Ryōta; born April 14, 1977), also known as Yama-chan (山ちゃん), is a Japanese comedian and television and radio personality. He rose to fame in the 2000s as one half of the manzai comedy duo Nankai Candies. Outside Japan he is best known as one of the commentators on the reality television series Terrace House.
Source: “Ryota Yamasato”, English Wikipedia (CC BY-SA 4.0), excerpt