Sega and Genesix have teamed up to make what is undoubtably the coolest iPhone Twitter app ever: Ryu ga Gotoku For Twitter (Ryu ga Gotokou is the Japanese name for Yakuza).

This free iPhone app will let you post tweets to your Twitter account, with images and shortened urls. It sounds like just like any other iPhone Twitter app, except... well, take a look:

The app has six themes from Yakuza Of the End, the latest entry in the series which hits the PS3 on 3/17.

You can download the app here.