Found at Akihabara UDX.
Suda-cho Shokudo Akihabara UDX, a Western-style restaurant located on the 3rd floor of the restaurant area AKIBA_ICHI, was renovated on December 7. It has reopened for business after about a month of renovation work.
For three days only, from December 7 to 9, the restaurant will offer "Suda-cho Hamburger Steak 150g (with rice and soup)" for 980 yen and "Suda-cho Hamburger Steak 150g (with rice, soup, and salad) + 1 drink" worth 2,010 yen at about half price. Limited to 100 servings each day.
Meanwhile, Tonkatsu Wako UDX Akiba Ichi Akihabara, located on the 2nd floor, will close on December 30.