Techniques in the Paleolithic period include blade technique to remove vertically long flakes and Setouchi technique to remove horizontally long flakes, however, flakes in the Jomon period seem to be made more freely by hitting and cracking the core and there were not strict standards.
旧石器時代には縦長の剝片をはがし取るための石刃技法、横長の剝片をはぎ取っていく瀬戸内技法などがあるが、縄文時代の剝片剝離は比較的自由に石核を打ち割っており、規格性に乏しい。