Well I reckon he's Japanese.
5 seconds sound clip from the Bolo (1977) movie soundboard.
You can hear this line at 01:38:26 in the Blu-ray version of the movie.
Quote context
[...]
- Now what the hell do you think you're doing? How dare you try to cheat me and rob my bank, huh?
- Everyone thought that there must be a bandit chief. But it was you all the time.
- Huh, since you know so much, I'm gonna have to shut your mouth for good.
- Well I reckon he's Japanese.
- Huh, well I reckon he's really the brother of Pao.
- You are right, Pao is my master.
- What, at cooking beef steak?
- No, at judo, swordplay, karate.
- Master, I have learned from you, please let me get them.
[...]