Everybody loves cameos whether how small or big it is as long as it is a cameo and someone compiled the list of cameos of past and some future tokusatsu actors in Kamen Rider Den-O!
Wait. Don't tell that punk was Kirihiko?! Anyways, here's the list of cameos found in this video.
+ Kirihiko Sudo/Nasca Dopant - Kamen Rider W
+ Demon Knight - Justirisers
+ Smart Brain Lady - Kamen Rider 555/Faiz
+ Teppei Kuze- Ultraman Mebius
+ MegaRed/Kenta - Denji Sentai Megaranger
+ Hurricane Yellow/Kouta - Ninpu Sentai Hurricanger
+ DekaBlue/Hoji - Tokusou Sentai Dekaranger
+ Jun Yazumi - Ultraman Tiga
+ Jiro Okamoto - Kamen Rider Black (suit actor)