An update patch for Dynasty Warriors 8 Xtreme Legends was released today on PlayStation 3, PlayStation 4 and PS Vita. The patch updates the game to version 1.01 and includes a number of bug fixes and other adjustments.
The patch will also add the Japanese Voice option, although this option will not be useable until July 29th in the U.S. and July 30th in Europe, when the Japanese-language voice pack is released as free DLC.
You can read the full list of patch notes for all three versions of the game here. The patch is already available for PC, and Japanese voices will be available for that version as well.