Nani No is a Japanese phrase that translates to "What?" in English. It is commonly used in conversations to express surprise, confusion, or a request for clarification. The phrase is often employed in both casual and formal settings, making it a versatile expression in the Japanese language. In popular culture, Nani No has gained recognition through various anime and manga series, where characters frequently use it to react to unexpected situations. This has contributed to its popularity among fans of Japanese media, further embedding the phrase into everyday language for many learners of Japanese.