The tonfa (トンファ) is a traditional martial arts weapon from Okinawa, Japan. Originally used as an agricultural tool for grinding grain, it was adapted as a weapon by Okinawans to defend themselves due to weapons bans imposed by invaders or local rulers. The tonfa is handled by inserting the arm through a cross handle, allowing the long stick to extend along the forearm. This not only offers protection against attacks, but also allows the user to apply a variety of striking, blocking and trapping techniques. Its unique design provides versatility and effectiveness in combat, being adopted even by modern police forces as an instrument of control.