The upper part of her right femur snapped in a fall at the Sento Imperial Palace, the couple’s residence, on Oct. 6 and she underwent osteosynthesis surgery at the University of Tokyo Hospital.

Emperor Naruhito, Empress Masako and Princess Aiko moved out of their longtime residence, the Akasaka Imperial Residence, on Sept. 6. They are moving into the renovated Imperial Palace and, once ...