"At first, I didn't intend to use the [vocal] piece in the film [Godzilla vs. Mechagodzilla II]. I instead planned to use it only as a timing cue. So, I originally wrote it only with nonsense syllables. Since the piece was going to be sung by children, difficult words would not have been appropriate. Latin also wouldn't have worked. So, I decided to use Ainu. The Ainu live in Hokkaido, close to Adonoa Island."