Getting a "shutout" in Touge is accomplished by winning both rounds of the event. Your first chance at Touge will come when you reach the Asia Club stage, after WSR Season 2. Your best bet is to set the difficulty to "Very Easy" and just cruise to victory. You should pair this achievement with "Eat It!", by making sure to win using the "5 second rule", where you will win the event by gaining a substantial lead on your opponent.