✔ 最佳答案
Actually, black color suit is considered for ceremonial occasions for the coming of age, marriage, funeral and ancestral worship.
So not many Japanese men wear black for work. They usually wear deep blue (navy blue?), gray, dark brown or charcoal gray.
Their dress shirt, on the other hand, would be more conservative. They don't wear pink or yellow or other colors like westerner do. (white or any colors but very light colors are preferred)