13 Katas are practiced in the OGKK system. These are classified as either KEISHUGHATA, during which execution the body is kept alternatively hard/tensed and soft, or HEISHUGHATA, during which the body is kept hard/tensed throughout.
SANCHIN DAI ICHI
SANCHIN DAI NI
GEKISAI DAI ICHI
GEKISAI DAI NI
Practice of Bunkai must be effective and practical.