Unarmed populace leads to creating bare handed fighting styles. Wasn't such a big deal in other countries where people are armed. The martial arts in those countries are all focused around swords, knives, canes etc. Whereas anj unarmed populace focuses on body strikes, kicks, sticks etc. "Oh no, sir, it's not a weapon, it's just a broomst-HWWOOOOARRRRRGH!"