If I had to rank this odd little Yokai Monsters trilogy, I'd say the second instalment, Spook Warfare, was the best, followed by this one, followed by the still decent 100 Monsters.
This third one makes me wonder if it's even a trilogy, because the monsters here are definitely different than the ones from the first two, but oh well. While they're cool, they're also not in it a lot- maybe even less than the first one.
Thankfully, the rest of the movie - all the non-supernatural stuff - is pretty decent. Nothing great, but a moderately interesting storyline that feels like a historical/samurai drama with a few brief ghost appearances as icing.
It's pretty serviceable, mostly enjoyable stuff, but it's definitely not great. That being said, and to avoid being too negative, it is more than worth watching if you enjoyed the first two in any capacity.