Naruhito- long a global advocate for clean water-
presented his research, conducted at Oxford University, on medieval English water transport.
On April 30, Japan's ailing 85-year-old Emperor Akihito will abdicate and be replaced
the following day by his 59-year-old son, Crown Prince Naruhito.
Crown Prince Naruhito will succeed his father Emperor Akihito,
who will abdicate the empire on April 30, 2019, putting an end to three decades long‘Heisei' era.