SEGA has confirmed that the Yakuza series is unlikely to see a release on the Xbox 360.
The company's Toshihiro Nagoshi explained to Eurogamer that when he was showing off the IP to Sony and Microsoft, the latter was least interested so they stuck with Sony ever since the franchise's inception.
At the beginning of the project we spoke to all the platform holders including Sony and Microsoft. Every platform holder was negative about this prospect, but we kept on pushing because we believed in the potential, and as we kept going one platform holder that showed interest and saw the prospects of this title was Sony. That's how we started working with them, and that's probably not going to change.
The Yakuza series started on the PlayStation 2 and has seen several releases on the console's successor. The publisher announced in June that the Yakuza series has shipped an accumulative of 5 million units worldwide.