Rider Time: Kamen Rider Shinobi (RIDER TIME 仮面ライダーシノビ,Raida Taimu Kamen Raidā Shinobi) is a three-episode TTFC-exclusive miniseries serving as the first installment of the Kamen Rider Shinobi multimedia project and the first of the Zi-O Rider Time series. In the miniseries, Rentaro fights an evil ninja while hiding his identity from his younger sister and rival.
In early promotional material, this miniseries was titled Part 1: Rider Time Shinobi (RIDER TIME SHINOBI,Raida Taimu Shinobi).[3]
The iterated episode title prefixes (First/Next/Last etc. NinPow) could be in reference to the similar pattern used in Shuriken Sentai Ninninger, which Tawada previously starred in.
Though the series was released in 2019 and primary took place in 2022 which ran concurrent with that year's installment of the franchise, Kamen Rider Geats did not have any immediate connections with Kamen Rider Shinobi, though small easter eggs were alluded to, such as Keiwa Sakurai being a fan of ninjas and his primary form being based off of one. In an interview, Hideya Tawada expressed his interest in appearing in Geats should the opportunity arise, which ultimately was honored through Geats Extra: Kamen Rider Tycoon meets Kamen Rider Shinobi, which released in 2023.