Prince William is expected to visit Miyagi and Fukushima prefectures, both of which were damaged by the March 2011 Japan Earthquake and tsunami.
One reason was that most airlines do not allow expecting mothers who are beyond 36 weeks of their pregnancy and the Duchess is already in her 36th week of pregnancy.
On Friday, he met Crown Prince Naruhito, who himself studied at the Oxford. In the weekedn, Prince William will visit a television studio and an exhibition in Tokyo, besides visiting the rebuilt region of Fukushima.
On Sunday, March 1, Prince William will visit Miyagi prefecture, which was affected by the 2011 tsunami and then the prince will embark upon his China visit.