Tsurudontan Udon Noodle Brasserie Shibuya is a Japanese restaurant on the 13th floor of Shibuya Scramble Square in Tokyo. It serves udon and soba, including sukiyaki udon, hot pot udon, and tonkatsu curry udon. Orders are placed on a tablet, and the udon noodle portion can be adjusted free of charge from one to three servings. The wait line is long.