There are many variations to this but only one is described here. The idea is as the name suggests. By entering the opponent's space a throw can be induced.
If being grabbed Katate Tori Ryote, tug down on both arms lightly to unbalance the opponent. Step behind yourself with one leg deep enough to be on an equal line with the opponent. The hand closest to the opponents body straightens in front of their chest (shuto). Shift the previously non-moved foot to a position behind the opponent while rotating the arm across their body (haitu) and shifting body weight to the leg behind the opponent.