The leaders of Japan and the United States have been discussing how to take their relationship into a new era. Shinzo Abe and Barack Obama want to work more closely in the Asia Pacific region on issues such as trade and security. We hear from one of the key figures of this alliance. Caroline Kennedy, daughter of John F. Kennedy, is the US Ambassador to Japan.NHK's senior commentator Aiko Doden sat down with her to talk about where the US-Japan alliance is heading and what we can learn from her father's legacy.