A conference on ‘Rejuvanating UK-Japan Relations for the 21st century was jointly held by the Sasakawa Peace Foundation and the Royal United Services Institute for Defence and Security Studies (RUSI).
The keynote address was by Prime Minister Shinzo Abe. You can read the speech in English here:
HRH, The Duke of York was the second keynote speaker.
Yōhei Sasakawa wrote an article which originally appeared in the Sankei Shimbun newspaper on 20 September 2013 entitled Ties with Britain Expand Japan’s Diplomatic Options Read as pdf. here: RUSI Sankei Sasakawa article (English) 20-9-2013
Japanese version here: ” 日本財団会長・笹川陽平 日英協力で外交の選択肢広げよ” – 日本財団会長・笹川陽平氏
More information about the conference, with photographs here: http://www.rusi.org/events/ref:E523986CE3C7C7#.UlMAlI1lQUp
Japan400 Event page with photos is here: http://japan400.org/event/uk-japan-security-conference-in-2013/
This post is also available in: Japanese