Demonstration by Hiroshi Katanishi Sensei, 8th Dan Kodokan, of Ko uchi gari, when the partner is moving backwards, moving forwards, to the side and when turning.
Ko ichi gari is an inner cutting movement of small range. Unavoidable. Ko ichi gari allows one to make a partner, who is bigger and heavier, fall to the ground. This movement requires speed and great mental agility.