Its sun, so dogshit sources, but starmer is a genocidal knight so fuck him.
There’s an interesing book by Serge Mol: “Classical weaponry of Japan”, about the weapons of Edo period, when owning of battle weapon, that is sword, bow, spear and firearms was forbidden to everyone but samurai. Out of over hundred different weapons and their variations presented in the book, 90% are hidden weapons, that is weapons easy to conceal and hide, weapons not even looking as weapons, or weapons masqueraded as items you could openly carry (like very long Japanese pipe, but made completely out of metal). Most of those even had dedicated combat techniques which were taught more or less officially at various dojos.