Tsutomu Sano (佐野 茂 Sano Tsutomu?), or Kou Domon (土門 廣 Domon Kō?), played Sig in Blue SWAT. He reprised his role only in voice that same year in the short 3-D film, Toei Hero Daishugō. He reprised his role in Juukou B-Fighter. He is known for playing Masaru Aso/Kamen Rider ZO in Kamen Rider ZO.