It is also known for its strabismus of the eyes. Being both a lap dog and a companion dog, this toy breed has a distinctive heritage. The Japanese Chin's coat requires weekly brushing or combing, with special attention being given to the skirt and the area under the ears and legs. 2.1 Coat and color. Its distinctive expression is characterized by a large rounded broad head, large wide-set dark eyes, a very short broad muzzle, ear feathering, and evenly patterned facial markings. 2.1 Coat and color. The Japanese Chin's flattened brachycephalic face can lead to breathing and eye problems. Temperature extremes (particularly heat) should therefore be avoided. Its oversized eyes are easily scratched and corneal scratches or more serious ulcerations can result.