The materials used for the breaking test shall be boards of cryptomerid cedar 33 centimetres (13 inches) long, 21 centimetres (8 inches) wide, and 24 millimeters (0.9 inches) thick. The referees shall check whether the materials correspond to the standards set up by the International Karate Organisation.

Each competitor shall use four techniques in the breaking test, SEIKEN (fore-fist), SOKUTO (knife-foot), ENPI (elbow), SHUTO (knife-hand), the total number of broken boards will be the base on which Decision by Tameshiwari will be made on. The Boards for the breaking test must be placed across the top of two stable blocks.

Each competitor must break a minimum of three boards. However, he may attempt to break as many boards as he likes. The cloth on top of the boards shall have been approved of by the referee, and placed on the board by assistants. The competitors are not allowed to move the blocks, however, they are allowed to measure the distant.

The break is only approved of (KANZUI) if the boards are completely broken in two pieces. If they are only half broken it will be regarded as failure (SHIPPAI)

In case of SHIPPAI (failure) the competitor is allowed to try again, but the number of boards is limited to only three. If the competitor fails the second attempt as well, the score of that attempt will be zero.

The TAMESHIWARI test will be held according to the referee's instructions. The time for breaking is set at two minutes. Overtime is considered as SHIPPAI.

After each break, the competitors shall move two steps counter-clockwise.