TOKYO:- The wedding of Princess Mako, the eldest granddaughter of Emperor Akihito, and her college sweetheart will be postponed until 2020 due to lack of “sufficient preparations”, news reports said Tuesday. Mako and Kei Komuro, both 26, had been scheduled to become formally engaged in a traditional court ceremony next month before their wedding on November 4. But the couple have decided there was not enough time to make “sufficient preparations”, Mako said in a statement quoted by Jiji Press.