Ai Otsuka (???, ?tsuka Ai), (born September 9, 1982) is a Japanese pop female singer-songwriter and pianist from Osaka, Osaka Prefecture, Japan. She is best-known for her 2003/2004 hit Sakuranbo, which stayed in the Top 200 Oricon Weekly Singles Chart for 101 weeks. Ai Otsuka is signed to record label avex trax, one of the biggest record labels in Japan which also manages other high-profile artists like Ayumi Hamasaki, Kumi Koda, BoA, Namie Amuro, and Every Little Thing. A piano player since age 4, Otsuka composes and co-produces her songs.
She also writes her own lyrics. Her music ranges from upbeat catchy pop/rock music that can be heard in tracks like Happy Days and Sakuranbo to touching ballads like Daisuki da yo and Planetarium.