I love Phase-4 performance and this them make everything really epic. I would have loved to see used for the character the old theme of Kasumi Alpha, but I pretty love his track too!
@David Gregg for answering to your question... Phase-4 was released in Japan today 27th March! (or better, I think yesterday for them). Translate with google the 1.05 notes for the Arcade version (http://www.gamecity.ne.jp/doa5/ultimate/information/info_20140325.html) and you will see a note about Phase-4 added to the roster of the arcade.
@hollow I mean at every DOA5U arcade. Those were specific location tests for a limited time. Kind of like what they did for MR who was officially released to arcades Dec. 24.