Crown Prince Naruhito may visit France with Crown Princess Masako in September to mark the 160th anniversary of Japan-France diplomatic relations, Imperial Household Agency sources said Thursday.The crown princess, who has long battled a stress-related illness, has not accompanied her husband on an overseas visit since July 2015 when they visited the South Pacific kingdom of Tonga for a coronation event.The agency is currently arranging the crown prince's official visit to France in mid-September, according to the sources. He is expected to meet with French President Emmanuel Macron and att…READ FULL ARTICLE