Drama movie about Japanese Americans farmers

I’m trying to find a movie that my friend watched as a teenager. The movie was set on a farm on an island off the coast of Washington state. A Japanese/American family hired a farm hand to work for them. The hand ended up having an affair with the farmer’s wife. He entertained the 2 kids by doing such things as listening to a radio station on his comb. I believe this film came out around 1970.

Any idea?

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I’d say Dreams of Glass (1970)