Watashi Kobayashi is the stage name of Kobayashi Ryōta, a Japanese solo artist born on 18 January 1999. His official website is heroicline.com.
In anime music, Kobayashi performed “Ningyō no Machi” as the ending theme for the TV anime The Case Book of Arne. The song was released digitally on 15 January 2026 and later received a music video. On 25 March 2026, he released the streaming album 原作_2, which includes acoustic self-cover versions of songs he had provided to Momoiro Clover Z.
