"Sunshine world tour" is a song performed by 夢色キャスト (Dream Color Cast), the in-game vocal unit from SEGA and Mynet's mobile rhythm game YUMEIRO CAST (夢色キャスト). The track was composed by Mitsushiro Honda with lyrics penned by Aki Hata, both well-known figures in the Japanese music and rhythm-game scene, Honda for his work across Sega's arcade rhythm franchises and Hata for her prolific songwriting for anime, game, and idol projects. The song originally appeared on the album "Vocal Collection 2 〜 DEPARTURE TO THE NEW WORLD 〜" released in 2016, serving as an upbeat, aspirational pop number built around themes of setting sail toward new horizons and chasing dreams. In YUMEIRO CAST, the seven-member cast of voice actors, including Ryota Osaka, Natsuki Hanae, Toshiyuki Toyonaga, Yuto Uemura, Yuu Hayashi, Yuuki Ono, and Tasuku Hatanaka, provided the vocals, each voicing a distinct character from the game's story. "Sunshine world tour" came to maimai as part of version MURASAKi PLUS in September 2017, initially locked behind a limited-time Event Course stamp card (the 夢色キャストコース) before becoming freely available later that October. At 140 BPM with a lively pop structure and bright, major-key melody, the track was charted by the designer LabiLabi for both its Expert and Master difficulties. The song was removed from maimai's playable catalog on March 17, 2021, making it unavailable in current versions of the game.