The mark consists of a sumo wrestler with beige skin and black hair in a bun holding a red bowl filled with brown soup and white noodles in his left hand and brown chopsticks holding noodles coming out of the bowl in his right hand. Above the sumo wrestler is a square outlined in black and divided into two rectangles, with the left rectangle containing two Chinese characters laid out vertically and the right rectangle containing eight Chinese characters laid out in two columns. Above the square is the word "UDON" and near the bottom left-hand corner of the square is a Chinese character in white font on a red square. The background is filled with design of flowing noodles and wave patterns in red lines. On the bottom right-hand corner of the drawing are four Chinese characters inside a red outlined box and beneath that smaller Chinese characters in black font.