Hikakin is one of Japan's best known YouTubers, first famous for beatboxing and later for energetic vlogs and product videos. Short clips of his exaggerated reactions have been reused across Japanese meme culture, and this drawn out kimochi warii line became a shareable reaction sound detached from its original context. The added www in the title is Japanese internet slang for laughter, similar to lol. It now circulates in edits far beyond his channel, used whenever something looks creepy, gross, or uncomfortably funny.