Falcom today on December 26, 2016 started the service of the PS Vita version The Legend of Heroes: Akatsuki no Kiseki in Japan.
The game is the official Vita port version of the 2016 August started game which is a PC browser (free to play) title.
Just like the PC version the Vita version available for free but only in Japan (the client available in the Japan PSN). It should be noted that you CAN NOT move the save data files between the PC and the Vita version and you can’t even sync them.
If you are interested in it, here is the PSN link: https://store.playstation.com/#!/ja-jp/cid=JP0223-PCSG01026_00-0000000000000001