Kamen Rider 555 (仮面ライダー555, Kamen Raidā Faizu), also called Kamen Rider Faiz, and stylized in English as Masked Rider 555 or Masked Rider Φ's, is a Japanese tokusatsu television drama. It is the 13th installment in the Kamen Rider Series. It is a joint collaboration between Ishimori Productions and Toei, and was broadcast on TV Asahi from January 26, 2003, to January 18, 2004. This series was the first to use TV Asahi's current logo. It aired as a part of TV Asahi's 2003 Super Hero Time block, alongside Bakuryū Sentai Abaranger. It is the first series marking the debut of technology, cybernetics, and greek letter motif.