Nakayama Kinnikun is a Japanese comedian and performer known for muscle-based comedy and the shouted catchphrase “Power!” This short clip spread online through reaction edits, reposts and meme compilations, especially where creators wanted a fast burst of exaggerated confidence. Its appeal is simple: the delivery is instantly recognisable even to viewers who do not know the original performer, and the one-word shout fits cleanly into short-form video timing. It remains popular because it works across gym jokes, absurd reveals and victory posts.