One Summers Day is composed by Joe Hisaishi originally from Day of the River (あの日の川 Ano hi no Kawa) which is a score of the film Spirited Away. Spirited Away (Japanese: 千と千尋の神隠し Hepburn: Sen to Chihiro no Kamikakushi?, Sen and Chihiros Spiriting Away) is a 2001 Japanese animated fantasy film written and directed by Hayao Miyazaki and produced by Studio Ghibli. Later, Hisaishi added lyrics to One Summers Day and named the new version The Name of Life (いのちの名前 Inochi no Namae?) which was performed by Ayaka Hirahara.
One Summers Day-Spirited Away OSTJoe Hisaishi