Seriously. No one comes out of four years in a coma and can sit up and use their arms and upper body, let alone their legs, in the first hour. Was he trying to write a cheesy script on purpose to imitate the Shaw Brothers ?
If it's an homage to that genre, they should put a warning label on it.
Besides that, it's too slow. Maybe that's part of the deal too. Whatever.
Plus what's up with the obviously not Japanese man playing one ? Another homage to cheese it seems.