This symposium series YKIS has been one of the main international activities of YITP since 1978. In the YKIS 2012, we will focus on the methods based on the AdS/CFT duality and discuss their wide-ranging applications including supersymmetric field theory, integrable models, black hole, condensed matter physics and so on. The symposium will be held during the long-term workshop
"Gauge/Gravity Duality" (24 September - 26 October, 2012). The workshop is designed to promote new inspirations on gauge/gravity duality as well as new collaborations through active discussions among participants, who are encouraged to stay for a long period.