Re: Well?
" Is the Japanese government to ban private ownership of knives?"
IIRC there was a push in the UK from a domestic violence lobby for all pointed knives with blades longer than 3 inches (75mm) to be banned from sale. They trotted out some TV chef to claim that you didn't need a pointed knife longer than that in the kitchen.
IIRC as the law stands you are on dodgy ground if you happen to have a long pointed knife anywhere in your possession in a public place. Walking to the pottery studio a few years ago - I was uncomfortably aware that my essential pointed "clay" knife in my tools bag was longer than that.