Happosai (八宝斎, Happōsai?) is a fictional character in the anime and manga series Ranma ½ by Rumiko Takahashi. Genma Saotome and Soun Tendo's tiny master, he is the founder and Grandmaster of Musabetsu Kakutō Ryū karate, more commonly known in the West as "Anything Goes Martial Arts".
"Happōsai" has the same sound as "八宝菜," or "eight treasures dish," a popular Chinese seafood dish in Japan. The 斎 character that 菜 has been replaced with was historically a common ending for martial arts masters' names. Myōga, a character from InuYasha, another one of Takahashi's famous manga works, oddly resembles him.