What city is the capital of the usa?how about japan?

What city is the capital of the usa?how about japan? which city is the capital of the USA?How about Japan?用英文回答 ( ) city is the capital of USA 填" Which" 还是"What Which is the capital city of the USA? Indianapolis is the capital and largest city of Indiana,USA. what city is the capital of china? what is the capital of japan怎么回答 what's the capital of the USA 是What city is the capital of.还是Which city is the capital of. is the capital of the USA. Tom lives in Tokyo ,the capital city of Japan.Is Tokyo the c Washington DC, the capital of the USA, is a beautiful city,