The concept of “Go No Sen” (後の先) in Karate, refers to a specific approach to combat and timing. It translates roughly to “after the initiative” or “responding initiative.”When you see the concept of “Go No Sen” at the beginning of Bassai Dai, it suggests that the initial movements and principles of the kata embody this idea. “Go No Sen” at the beginning of Kata Basaidai highlights the importance of responding effectively to an opponent’s attack, utilizing their energy, and seizing the opportune

Judo Belts Requirements Explained – YouGoJapan