The title OOO signifies the three medals that the main Kamen Rider uses to transform as well as being representative of the infinity symbol with an additional circle. Both 'OOO' and 'Ooz' are intended to be read as 'O's', referring to the multiple uses of the letter O in the title as well as 'multiple kings' ( 王ｓ, Ōzu ?). Unlike several previous Heisei Rider Series, no alternate name has been given yet for the three O's in the title (Ｗ（ダブル） (, Ｗ（ダブル） ?) read as 'Double' and 555（ファイズ） (, 555（ファイズ） ?) read as 'Φ's/Phi's/Faiz') aside from an alternate spelling of the name of the main Kamen Rider: Ooz. The creature designers are Yutaka Izubuchi, known for his work on the Lords in Kamen Rider Agito, and Tamotsu Shinohara, known for his work on the Mirror Monsters of Ryuki, the Orphnoch of Kamen Rider 555, and the Fangires of Kamen Rider Kiva. OOO is written by Yasuko Kobayashi, known for the screenplays of Seijuu Sentai Gingaman, Mirai Sentai Timeranger, Kamen Rider Ryuki, Den-O, and Samurai Sentai Shinkenger.

Kamen rider ooo greed