Kamen Rider 555 (仮面ライダー555（ファイズ）, Kamen Raidā Faizu, officially Masked Rider Φ's, also read Kamen Rider Faiz or Phi's) is a Japanese tokusatsu television series. 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.

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