The world of Brigadoon was named after the famous Frederick Loewe-Alan Jay Lerner musical "Brigadoon," which was a location that appeared only once a hundred years.
Most of the characters and episodes in the series are named after a color.
The show's setting in Yayoi, Tokyo 1969 was based on the neighborhoods that director Yoshitomo Yonetani and art director Takashi Nakamura once lived in.