Proof: Chozen and Sato were the heroes
In the KK II the only two people who were dishonored were Chozen and Sato.
Chozen was when Danielle broke the weight at the vegetable stand so Chozenwas shown that he was giving the villagers more money then what their produce was worth. Okinawans have too much pride to be given a gift like that so Chozen wanted to give it to them without their knowing,
Sato was dishonored by Miyagi many years ago when Miyagi stole Sato's arranged wife.
At the very end of the movie during the closing credits the predominant words in the song "Glory of Love" is "I am the man who will fight for your honor" Neither Miyagi nor Danielle were dishonored during the movie so the song was written about Chozen and Sato, hence they were the heroes of the movie.