THERE'S NO SUCH THING AS A FUCKING "NINJA SWORD", ninja did not have standardized equipment or tactics or leadership. They were assassins and spies, they would have no use or legal cover story to carry a sword and would be immediately caught.
a KATANA is a SAMURAI SWORD you fucking SWORD PHILLISTINES
why? BECAUSE IT WAS USED EXCLUSIVELY BY SAMURAI
they would EXECUTE YOU for OWNING A SWORD if you were not a samurai
Heck, the samurai would hide next to roads at night and MURDER RANDOM PEASANTS that crossed their path just to TEST THEIR NEW SWORDS
If it didn't kill in 1 stroke, it was a SHIT SWORD
and it was PERFECTLY LEGAL because JUST LIKE EURO KNIGHTS the samurai were WARLORD KILLER MAFIOSOS who survived by PILLAGE AND OPRESSION
you idiot anglos INVENTED the term SAMURAI SWORD because your IDIOT ICE MUTANT MOUTHS can't pronounce something as simple as "KA-TA-NA" so USE YOUR OWN WORDS IDIOT BRITS