Japan's imperial family is diminishing. Plan for male-only succession could make it worse

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FILE - Japan's Princess Aiko, left, the daughter of Emperor Naruhito and Empress Masako, arrives to mark the 110th anniversary of the death of the wife of former emperor Meiji at Meiji Shrine in Tokyo, on April 10, 2024. (Kazuhiro Nogi/Pool Photo via AP, File)