Watched at the Japan Film Festival 2019
Pros
-A generous amount of intense fight scenes, ranging from one on one to many against many.
-A beautiful movie- kudos to director Sato for making the effort to film in China and capture its gorgeous scenery and architecture. In this sense, it felt like a Japanese version of Lord of the Rings or the Hobbit trilogy.
-Well-executed performances all around, especially from Yoshizawa Ryo and Nagasawa Masami. They absolutely radiated power and fortitude.
-Well placed and often hilarious humor that breaks the serious tone.
-Rousing speeches aplenty.
-Nice soundtrack.

Cons
-Adepted from a manga but regardless, the characters often feel and act like stereotypes, with not much unique to distinguish them otherwise. The story too, though well executed, is nothing new.
-Some of the fight scenes got a little out of hand, especially with the jumping.
-Shin's words and behaviour are repetitive at times.
-Certain characters seem to mysteriously disappear and pop up again much later as needed.

Conclusion; Not groundbreaking (apart from the obviously luxurious budget used to create it) but a very fun watch with a grand scale and likeable characters.