Some more photos:
From Koda Kumi Taiwan Fan Page on fb
About the Sean Paul topic - to be fair, he had an own Oricon live just about two days later in Tokyo. So he wasn't there only for Kuu's live.
But the concept of the a-nation show and a-nation shows in general are summer festivals with perfromances of different artists.
Even though the vast majority of the fans attending were Kuu fans, there also were some fans of the other artists (even a little group for SHOW, saw them on Instagram). Kuu gave the frame and the theme of the show as main act- but she filled it together with her guests.