Your Japanese martial arts, are not, in fact, Japanese. They originated in China, where the techniques are the best in the world.
8 seconds sound clip from the Heroes of the East (1978) movie soundboard.
You can hear this line at 00:44:01.267 in the DVD version of the movie.
Quote context
[...]
- Master, you sit down now, huh? Sit down, sit down, huh. Right.
- Right?
- Good. You've made good progress.
- You know, if I hadn't been so busy teaching, you and I would have been married by now.
- Oh, Miss! Letter from Hong Kong for you.
- Japanese martial arts are very poor, as you ought to know, because I beat you every time.
- Tell me, girl, is your husband a top exponent of Chinese Kung Fu?
- Well now... I'll go and see.
[...]