Tadanobu Asano is the guest and subject of this week’s installment of “Family History” (NHK-G, Wed., 10 p.m.), which probes a famous person’s background in depth.

The popular 37-year-old actor talks mainly about his maternal grandfather, a Navajo Indian who came to Japan just after the war, with the American occupation. He married Asano’s grandmother, a geisha and champion ballroom dancer, but the union only lasted long enough to produce a daughter. Then he returned to the U.S.

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