Shin Sayama is a Japanese voice actor. This name is a pseudonym used by Megumi Matsumoto, a voice actress born on February 6, 1977, in Kumamoto Prefecture, Japan. She employs the alias Shin Sayama specifically for her work in adult content, while using her legal name, Megumi Matsumoto, for general audience productions.

In her mainstream career as Megumi Matsumoto, she has built a substantial portfolio of voice roles in anime television series and films. One of her most recognized recurring roles is Kunikida, a classmate of the protagonist, in the Haruhi Suzumiya franchise. She voiced the character in the 2006 series The Melancholy of Haruhi Suzumiya, the 2010 film The Disappearance of Haruhi Suzumiya, and the 2015 spin-off series The Disappearance of Nagato Yuki-chan. She also played significant roles in other popular series, including Jirou in Death Parade, Robin in Le Chevalier D'Eon, and multiple characters in the Higurashi: When They Cry franchise, such as Daiki Tomita. Her film work includes a role in the 2020 feature Violet Evergarden: The Movie. In addition to these, she has had leading roles in longer-running series aimed at younger audiences, such as Kouya Marino in Crush Gear Turbo, Ken Minami in Shutsugeki! Machine Robo Rescue, and Ryuta Kodai in Dinosaur King.

Under the Shin Sayama alias, she performs in adult-themed anime. The user's provided example, the role of Corneo in the series Buta Hime-sama, is credited to this pseudonym, confirming the connection between the alias and that specific performance.