"Fukurou" Japanese restaurant is among the two best in Milan!!! This is NOT all you can eat. Food is cooked by a Japanese chef and Japanese is the staff. The place is small and decorated in classical Japanese style. I warmly suggest you to book a couple days before. Prices are high but boy they deserve them! A complete meal is around 55€-75€ cad.
A little curiosity: restaurant's name means "Luck in a box". Buon appetito!