Don't Wear Black in Japan
Black Means Death in Japan, Avoid Black Clothes
In Japan, the color white is attributed to happiness and good times. Death is a time of mourning and so people must dress in the color of depression, black. Men usually wear a black suit with a black tie (dress shirt is usually white). Women are also usually in a black dress. Wearing a formal black skirt is common but be sure to wear black nylons. Shoes and socks are black too. Kids usually just wear their school uniform but parents often decide to leave younger kids at home.
Since the color black is often associated with funerals in Japan, wearing a black tie to work is rare and regarded as bad luck. Thats something people just don't do here and black ties are used primarily for funerals only.