U.S. Ambassador to Japan Caroline Kennedy sent a letter Thursday to thank a 92-year-old woman from Kitami, Hokkaido Prefecture who gifted a set of traditional Japanese dolls decades ago that is now on display at the envoy's residence in Tokyo.U.S. Ambassador to Japan Caroline Kennedy sent a letter Thursday to thank a 92-year-old woman from Kitami, Hokkaido Prefecture who gifted a set of traditional Japanese dolls decades ago that is now on display at the envoy's residence in Tokyo.