AP Bank stands for "Artists Power" - power to address pressing environmental issues. The bank was founded by 3 men from Japan's music industry who wanted to do something good for the environment, and knew just another benefit concert was not enough. The bank funds projects related to the environment and alternative energy. And of course, there are also benefit concerts.
(Kazutoshi Sakurai and Takeshi Kobayashi, two of the founders, were were recently profiled by Time as Heroes of the Environment.)