If an article on Kotaku is to be believed, that’s a yes.
According to a news post on Kotaku regarding whether Yakuza would be coming to the Wii U (of all systems), the PSVita version has been confirmed by Yakuza producer Toshihiro Nagoshi;
Elsewhere in the interview, Nagoshi was asked if Yakuza was coming to the PS Vita. The game producer replied affirmatively, once again acknowledging how the series has been born and bred on PlayStation hardware.
Good news for Vita owners and Yakuza fans alike if true, we’ll just have to wait and see!