[Sunred]

Anyone here have a favorite Japanese tv drama that they liked which included rider alumni(s) as a lead(s) or regular(s)?

Personally I liked Shitamachi Rocket which was a good drama based on a novel.
It had Sano Gaku(Kazuraba Kouta/Kamen Rider Gaim), Takeuchi Ryoma(Tomari Shinnosuke/Kamen Rider Drive), and Kikkawa Kouji(Narumi Shokichi/Kamen Rider Skull) as regulars.
It is about an aerospace researcher(played by Abe Hiroshi, aka that guy who played a Roman who time travels through bathtubs) who quits his career and inherits his father's small engine factory, but because of his love for space he takes up the challenge to build a rocket engine with his employees which leads to heartfelt moments and struggles.
Sano and Takeuchi play the role of the employees at the factory, and Kikkawa plays the role of a boss at an aerospace development team of sorts.
Probably one of the best Japanese dramas that I have seen in a while, and having familiar faces helped me get into it.
Oh, and this guy appears as a regular too.