The action was easily the best part and it was so good, some of the fighting scenes were so creative and there weren't too many cuts and they felt mostly grounded to reality.
The cinematography felt really cheap to me, lot's of drone and handheld gimbal shots so they looked a bit janky to me whenever the camera was following something. Scene change continuity broke a few times but it wasn't that jarring and some of the scene locations looked like they were chosen for ease.

I think the acting was very generic japanese acting so nothing really amazing but the flashback scenes in comparison were really well done. Also the CGI and VFX were really good and the animals were convincing even though they would have to have been CGI.

Some of the costumes weren't the best quality, especially a certain wig that you can see a close up of a few times, but the clothing looked fine to me and the injuries and stuff looked really convincing as well.