The 'Ran Ran Ru' meme originated from a series of Japanese McDonald's commercials starring Ronald McDonald—known as Donald McDonald in Japan—where he performs a rhythmic chant and hand gesture to express his happiness. The footage became a cornerstone of internet subculture on the Japanese video-sharing site Nico Nico Douga in the late 2000s, where users remixed the clips into elaborate musical parodies, most notably set to Touhou Project's 'U.N. Owen Was Her?'. Characterized by its surreal, high-energy, and often unsettling repetition, the meme represents a peak era of MAD video culture and remains a nostalgic symbol of early viral video editing and Japanese remix culture.