It's a charity exhibition for the victims and reconstruction efforts of the East Japan earthquake and tsunami in March.
Featured matches are:
Kei Nishikori vs Michael Chang
Kimiko Date Krumm/Shuzo Matsuoka vs Ai Sugiyama/Kei Nishikori
Kei Nishikori/Shuzo Matsuoka vs Michael Chang/Takao Suzuki
Takao Suzuki vs Shingo Kunieda
(Kimiko's pic is not on the poster because she announced her participation rather late.)
Tickets are sold out.