The artifacts such as yoroi (armor), ken (swords with two edges sharpened), hoko (long-handled Chinese spears), yajiri (arrowheads), yumi (bows as a weapon), haniwa (clay figures), and the like of the Yayoi period have been found, and Japanese Mythology in the "Kojiki" (The Records of Ancient Matters) and the "Nihonshoki" (Chronicles of Japan), etc include descriptions of the weapons such as ken, hoko, katana (swords), yumi, and the like, so it can be guessed that there were some kinds of bugi (martial practices), but the details can't be known.
弥生時代の鎧、剣、矛、鏃、弓(武器)、埴輪などの出土品や、『古事記』、『日本書紀』などの日本神話に剣、矛、刀、弓など武器の記述があることから、なんらかの武技は存在していたものと思われるが、詳細は不明である。