If someone is to do a custom blu-ray of HARD BOILED, you will want to use the Japanese blu-ray:
http://www.blu-ray.com/movies/Hard-Boiled-Blu-ray/73854/
I don’t know how the Japanese release of THE KILLER looks, but there are screen caps of HARD BOILED and they are true HD:
http://forum.blu-ray.com/showthread.php?t=213591&page=2
Plenty of screen caps between the US and Japanese blu-ray.