Just as in the real world, Kiryu would be nothing without his Xperia Smartphone. Believe it or not, everything you need to know can be found in this little gadget. On top of receiving and sending various forms of communications with other characters, the same that will help you proceed during a number of missions of the Main Story, you will also have your To Do List found on your phone.
But that's not all! With your phone, you can even take a glance at Kiryu's Current Stats and the EXP you presently have available, as well as all of your weapons and items. Like any smartphone these days, the Xperia also is equipped with a Camera, the same Kiryu can use to take Ghosts Photos of previously deceased Yakuza Series Characters and even Selfies of himself around the cities of Kamurocho or Onomichi. Of course, you will also be able to Manually Save the progress of your game with you handy-dandy smartphone.