I moved to Japan where knives are also heavily restricted. If you live in Japan, you need a permit to purchase anything with a fixed blade over 15cm and it must be kept in the home. You can't legally carry a pocket knife with a blade longer than 6cm (I think 8cm if it's a folding but not fixed blade) and even then, if stopped, you need to have a specific reason for carrying it around.
It was really weird to me, as someone who carried a pocket knife basically everywhere. I did learn, though, that "in case I need to open boxes" is a case that has come up like twice in 10 years.
As for guns here, handguns are not allowed at all. There are licenses for airguns (pellet guns), rifles, and shotguns. Separately, there are licenses for trapping and hunting that do grant some permissions outside of what I wrote above (hunting/trapping license but no gun license means you're going to be killing your catch with knife, spear, strangulation, drowning, or electrocution).