KUMAMOTO, Japan — A week before the artist, author and architect Kyohei Sakaguchi planned to move into one of his celebrated “zero yen” houses, built from recycled materials, the catastrophic 2011 earthquake struck Japan. A tsunami engulfed the Tohoku region and the Fukushima Daiichi nuclear power plant collapsed. He had recently begun treatment for bipolar disorder. Overwhelmed, he left Tokyo and
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