Is it legal to keep a Katana? Don't you need a license for it?

I remember when I was very small there's a weapon shop in Johor Bahru Holiday Plaza where they sell Nunchucks, Swords, Sais, you know those you see in Ninja Turtles. Real Stuff man!

BTW other than blunt/sharp, what other difference between Replica and real Katana? If it's only blunt i don't mind i can always sharpen it.

So come on any professional shops that sell them at reasonable price?