The technique comes from Rurouni Kenshin, released in English as Samurai X, where wandering swordsman Kenshin Himura fights using the fictional Hiten Mitsurugi sword style. Ryu Tsui Sen is one of its named aerial attacks, shouted as he strikes from above. The line travelled beyond the original series through anime clips, fan edits and soundboard uploads, where short battle cries are easy to reuse. It remains popular because the name alone signals a decisive, high-speed sword move to longtime anime viewers, even without showing the full scene.