Use of matchlock guns spread at a high speed that was unusual compared even with world standards, and they became used throughout Japan in quite a short time, completely changing fighting styles during the Sengoku Period (Period of Warring States).
火縄銃は、世界的に見ても異常な速度で瞬く間に日本全土に普及し、戦国時代の戦闘の形態を一新させた。