Princess Yuriko, the oldest member of Japan's imperial family and great-aunt of Emperor Naruhito, has been hospitalized after being diagnosed with having an abnormal heart rhythm, the Imperial Household Agency said Monday.The 97-year-old princess, the widow of Prince Mikasa, is not in serious condition. Earlier in the day, she was admitted to St. Luke's International Hospital in Tokyo, where she is expected to stay for about a week, according to the agency.Last fall, the princess was hospitalized for about two weeks for treatment of pneumonia and heart failure.A member of Japan's former nob…READ FULL ARTICLE