Japan's imperial family is running out of male heirs, and a debate over how to preserve the hereditary lineage that has continued unbroken for centuries is dividing the nation. Meanwhile, Emperor Naruhito and Empress Masako wrapped up their two-week trip to Europe, and Japan took note that their royal Dutch and Belgian hosts both have women in line for the throne. FRANCE 24's Aurore Dupuis breaks down the looming succession crisis in the world's oldest monarchy.