Princess Mako, the eldest granddaughter of Emperor Akihito, met with her longtime calligraphy teacher at an exhibition in Tokyo on Friday in her first official duty since the Imperial Household Agency announced she will postpone her marriage until 2020."The longer the engagement period, the more happiness it will bring," Shodo teacher Shuko Yanagisawa, 73, told the 26-year-old princess as she gave her a tour of the exhibition displaying works by 100 major female calligraphers in Japan.The agency announced Tuesday that Princess Mako will postpone her wedding to her university sweetheart Kei …READ FULL ARTICLE