working on Rez, which led him to focus on making sound effects to supplement music for the prototype. He experimented with rhythms that synchronized with the game's time line bar. When deciding Lumines: Puzzle Fusion mood, Mizuguchi felt something was missing from the soundtrack and looked for extant external music. While on a mid-year camping trip in Okinawa, he discovered the song "Shinin" by Shinichi Osawa. The discovery motivated him to ask Yokota to implement a mode that would match music with visuals. Mizuguchi also asked Osawa to include four tracks that would be sequenced with the theme of a party beginning at sunset and ending at sunrise. Osawa contributed the songs "Shinin", "Shake Ya Body", "I Hear the Music in my Soul", and "Lights". Yokota initially thought the game's soundtrack would be limited to techno and dance music, and worried the project lacked musical variety. Takayuki Nakamura joined the project as the lead composer after the prototype was completed with Yokota assisting. He overcame this problem by constructing a rich variety of songs that were based on an understanding of the game's design, and considered the final product to be reminiscent of ambient music. Nakamura primarily used Reason and Ableton Live software to compose the songs. His goal for the background music was for it to feel complete and enjoyable to listen to despite it changing during gameplay. The music and skins were simultaneously developed; the music had to be completed before the skins were finalized. Exceptions were made for the tracks "The SPY loves me" and "Japanese Form", which were directly influenced by Yokota's design. Nakamura implemented strict rules for the songs to follow time signature because the playing field is divided into 16 columns and the time line needed to be synchronized with the beat. He made an exception for the song "Big Elpaso", which alternates between time signatures and , resulting in an average of a time signature for every two bars. On December 12, 2004, Lumines: Puzzle Fusion was published by Bandai and released in Japan as a launch title for the PSP. For North America and Europe, the game was published by Ubisoft and was released on March 23 and September 1, 2005 respectively. Ports Lumines: Puzzle Fusion was ported to multiple platforms, each with their own revisions. In September 2005, mobile game publisher Gameloft announced it would release Lumines for mobile phones. Lumines