As of today, Game Version 14.07 is live for Taiko Momoiro in Japan, and so is its new tune for the Vocaloid genre as well! Kagerou Days Comes in with a pretty standard 7-star Oni mode mostly filled with mono-colored clusters. Its really-high BPM already plays a role on this song's difficulty!
Predictably enough, Kagerou Days comes with an Ura Oni mode as well, featuring another cluster-based challenge which still can be considered as the little brother of other Vocaloid Oni modes on Taiko, such as Matryoshka's Ura Oni mode. It's still quite a challenge, don't get me wrong!