Tokyo Connection is the first concept album and first mini-album by the female Japanese hip-hop unit Halcali. This album is described as a "sequel" to Tokyo Groove of the previous year, hence the title.
"Roman Hikou", was used as the theme for Sony's campaign for the camera line "Cyber-shot". Halcali recorded their own promotional video using the camera, documenting a recent trip they took together. Also used as the ending theme song to the TBS show "Aimai Na!" from October to December 2010. Also used as the commercial song for Nissan Motors.