Weiß (German for "white") was started by Takehito Koyasu, a Japanese voice actor in anime. He also had the idea for an anime named Weiß Kreuz, in which he was the voice of Fujimiya Aya, one of the main characters in the group Weiß (who are assassins in the anime, not musicians). With his colleagues Tomokazu Seki, Shinichirou Miki and Yuuki Hiro, Takehito Koyasu formed Weiß and they produced a lot of songs for the TV series Weiß Kreuz.