Kamen Rider Decade (仮面ライダーディケイド, Kamen Raidā Dikeido), stylized in English as Masked Rider Decade or Masked Rider DCD, is a Japanese television show and the 2009 installment of the long-running Kamen Rider series of tokusatsu dramas. Decade, as its title suggests, is the tenth anniversary series of Kamen Rider's Heisei era, and the final installment of its first phase. It began broadcasting the week following the finale of Kamen Rider Kiva and was featured in Super Hero Time alongside the 2009 edition of the Super Sentai series, Samurai Sentai Shinkenger. Kamen Rider Zi-O, the last Heisei-era series, broadcast in 2018–2019, acts as a spiritual sequel, where both Decade and Diend play prominent roles as re-occurring side characters who are directly involved in that series's plotline.