Kyoto Nights was created using an innovative technique for creating freeform music – a program called ColorMusic (written by Shinichiro Hirama). This program translates the movement of a mouse over contrasting colors in an image file, and converts the result to music in the form of a midi sequencer file. The raw source for Kyoto Nights came from using a screenshot from the game Oni, and then edited and processed with different instruments in Melody Assistant.