Detecting a throw coming your way is a skill that you can sharpen if you spend enough time sparring against partners who have Ouchi gari as a primary technique in their arsenal.
Every judoka has a number of 3-5 techniques that their judo game revolves around, even the best judokas adhere to this rule.
Find sparring partners who like to use Ouchi gari in their game and spar with them. With time, you will start sensing it coming a mile away. High-level judokas are known for building that skill.
Now that we have explained the principles of the throw, let’s get to the practical steps.