Portuguese traders brought the first matchlock guns to Japan in 1543. Though swords had been the samurai's weapon of choice, the combat efficiency of guns could not be overlooked. Called 'tanegashima' after the island where they were first introduced, they became a common sight on battlefields toward the end of the Warring State period. Matchlocks were instrumental in many famous victories of the era, such as the Battle of Nagashino where the dreaded Takeda cavalry charge failed in the face of Tokugawa gunners and spearmen. During the peaceful and isolated Edo Period, there were few battles where tanegashima would be useful, so they were stored away in favor of swords once again.