If you loved Kenji Mizoguchi: The Life of a Film Director, try Children of Hiroshima
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Kenji Mizoguchi: The Life of a Film Director
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Children of Hiroshima
What they share
Both films are directed by Kaneto Shindō. If that's the register that drew you to Kenji Mizoguchi: The Life of a Film Director, the second film will land in a comparable space — through a different lens.
What Children of Hiroshima is
You teach in a school near Hiroshima and then face the aftermath of the atomic bomb. The film leaves viewers with a sense of devastation.