The scheduled 12 - rounder was set for Aug. 10 at Aichi Martial Arts Gymnasium .
The scheduled 12 - rounder was was postponed after the sixth - ranked Japanese injured muscles in his back while training in early July .
The scheduled 12 - rounder was set for Aug. 10 at Aichi Martial Arts Gymnasium but was postponed after the sixth - ranked Japanese injured muscles in his back while training in early July .