Samurai Did Not Trust So Much to Their Armor As European Knights Did

It is noticeable that the introduction of firearms through the Portuguese made it easier to get some sort of an army of comparatively untrained farmers, though the matchlock did not prove such a great asset as they may have hoped, since it was not very convenient to use when the weather was wet, as it often is in Japan, and its range was possibly not greater, and its accuracy not as great, as the bow and arrow. It is here that there is some difference between conditions in Japan and Europe, for in Japan the samurai was an archer, either horse or foot, and did not trust so much to his armor as the European knights did, neither did he advance in the massed charging formation that would be more vulnerable to gun fire.

— Shogun, Chapter 4