After reviewing weapons to replace piercing weapons having a long handle with weapons suitable for group tactics, spears were considered to be a main weapon, which led to the introduction and widespread use of firearms matchlock guns that used gunpowder.
このことに適した武器として長柄の刺突武器が見直された結果、槍が主力武器とされ、火薬を用いた火器火縄銃の伝来、普及へと変化した。