Japan is running out of royal heirs

King and Queen Bid Farewell to Japan Emperor on Final Day of State Visit

Emperor Naruhito visits Japan House in London during state visit | AFP

LIVE: State Banquet For Emperor and Empress of Japan at Buckingham Palace

King and Queen host State Visit for Emperor and Empress of Japan at Buckingham Palace

King And Queen Host Japanese Royals at Glittering State Banquet

King Charles Queen Camillia and Prince William greet Japan's Emperor Naruhito | BBC News

Japan's Emperor Naruhito and Empress Masako land in the UK for state visit | AFP

LIMITED TIME Nearly Full FOOTAGE: Emperor and King make speech at the State Banquet in U.K. 英国晩餐会

King and Queen welcome Emperor and Empress of Japan in state visit

Emperor and Empress of Japan visit the royal family

LIVE: Emperor and Empress of Japan Begin State Visit

In full: King Charles formally welcomes Emperor of Japan at military parade

UK Royals Give Ceremonial Welcome For Japan’s Emperor And Empress

King Charles and Prince William welcome Japan's emperor for state visit

King Charles III welcomes Japanese Emperor Naruhito for state visit

FOOTAGE: Emperor and Empress arrive in U.K.

Japanese Emperor welcomed in London by Britain's King Charles | AFP

Japan's Emperor Naruhito arrives to greet King Charles in London during state visit

LIVE: Japanese Emperor receives ceremonial welcome from British King