The clip circulates online as a short meme sound linked to Japanese YouTuber Seikin, whose name also appears in fan spellings such as Saenskin, and it is often tagged alongside his brother Hikakin. The Japanese word in the title means formation, which explains why creators reach for it when groups assemble, march or move together. Because it lasts less than a second, it spread easily through short-form edits and soundboards, where a tiny recognisable voice snippet can carry a joke on its own. Its continued use comes from that simple visual match rather than a longer scene.