First Asian martial arts in a Hollywood film
I've often seen the judo sequence in BLOOD ON THE SUN (1945), with James Cagney, cited as the first instance of Asian martial arts in a Hollywood film. Well, this film came earlier by two years and features a full-on bout between an American boxer (Robert Ryan) and a Japanese wrestler (Mike Mazurki) who uses karate kicks and chops and judo moves against Ryan. Excellent sequence.
Is there anything earlier than this?