Towa no Tsurugi (Action RPG by Sega and Aiming)
Youtube link | Pop Up
Sega has signed a deal to publish some mobile games from Aiming, of which I believe this is the first. Check out the video, due out in March in Japan. It will be free with some IAPs as far as I can tell.
Official site here - http://towanotsurugi.sega-net.com/
Screens at Famitsu here - http://app.famitsu.com/20130214_129751/
My iTunes Japan App Store Price Tracking Site - http://www.nihonappworld.com/