In 1999, Yasunori Mitsuda, now a freelance composer, returned to score the soundtrack for "Chrono Cross" after being contacted by Masato Kato. Mitsuda decided to center his work around old world cultural influences, including Mediterranean, Fado, Celtic, and percussive African music. "Xenogears" contributor Tomohiko Kira played guitar on the beginning and ending themes. Noriko Mitose, as selected by Masato Kato, sang the ending song, "Radical Dreamers ~ Le Trésor Interdit". Mitsuda was happy to accomplish even half of what he envisioned. Certain songs were ported from the score of "Radical Dreamers", while other entries in the soundtrack contain leitmotifs from both "Chrono Trigger" and "Radical Dreamers".