The Nakasone OFF (中曽根OFF) is one of the most legendary events in Japanese internet history, originating from the video-sharing site Nico Nico Douga in the mid-2000s. It refers to a series of large-scale 'offline meetings' where anonymous internet users gathered in public spaces to perform perfectly synchronized dances to popular 'MAD' (remix) videos, most famously the 'Nakasone Hall' medley. This medley featured high-energy tracks like 'Neko Mimi Mode' and 'True My Heart.' The movement represented a unique era of web 2.0 where digital communities manifested physically through collective performance art. Today, the meme is used to evoke nostalgia for early internet culture, celebrate massive group efforts, or ironically highlight the absurdity of hundreds of people dancing in unison to anime songs.