The Interhigh championship is a high school basketball tournament in Japan. It is hosted every year and is held in every prefecture, to look for the best eams of that prefecture to advance to the Nationals. In Kuroko no Basuke, only the Interhigh in Tokyo has been seen.
Before the actual Interhigh, there are preliminaries first. They are held in four separate blocks, Block A to D. The teams must advance 5 rounds, the semi-final and the final to be the winner of their block. That team is qualified for the final league of the preliminaries. In that final league, those four teams compete against each other and the best three teams will finally advance to the Interhigh.
