A is a bat used in aikido for strength and suburi training. Despite being only overall, with 10 inches for the handle, the "blade" is a large lump of rectangular wood, with its cross-section being a square with dimension of three square inches, and has an overall weight of 4 to 7 lbs. By designating one corner as edge, an aikidoka can use it as an even heavier suburitō, practice suburi, kata, hasuji (edge-angle) and tomei (swing stopping), and learn the bounce-back of the sword by practising against tanrenuchi, now typically a tyre stood upright on a concrete base.