This gentleman is a famous Japanese teacher, and he taught me the secrets of Ninjitsu.
10 seconds sound clip from the Heroes of the East (1978) movie soundboard.
You can hear this line at 00:48:31.660 in the DVD version of the movie.
Quote context
[...]
- Right. We got the challenge!
- Tell me... are you Ho Tao? -Yes.
- This gentleman is a famous Japanese teacher, and he taught me the secrets of Ninjitsu.
- These men are some of the best fighters in Japan. We've come here to accept the challenge you made.
- Challenge? But I never challenged you men, though. You've made a mistake.
- This letter, you wrote it, didn't you?
- Yes. That's a letter I wrote my wife. How'd you get it?
- Your wife is Japanese, and so any challenge to her, is a challenge to us, as well.
[...]