Ai Otsuka is a Japanese pop singer/songwriter under the avex trax label who is best known for her 2003-2004 hit Sakuranbo which charted for 101 weeks in the Top 200 Oricon Weekly Singles Chart. Ai Otsuka is now a popular well-accomplished artist who has shown strong chart presence ever since the release of this surprise hit. Her music reanges from upbeat catchy pop/rock music such as tracks like Happy Days and Sakuranbo to touching ballads like Daisuki da yo and Planetarium.