Tomoko Yamaguchi is 35 years old women and is an orthopaedic surgeon who runs a bone clinic. She was a well-known Judo practitioner said to be the best of her class in Japan. Yamaguchi is known by most of the characters to be extremely physically attractive. She has a voluptuous figure and large breasts. She is always maintains her composure and tend to be Professional to her job in the face of her patients.