I am an American female citizen marringmarrying a dual (Japanese & American) citizen man and I know that Japan has a law that states that Japanese women have to change their last name when they get married. I have my number in Japan, so I exist in their system there, but we live in the USA and are planning to get married here. When we get married, I would like to keep my last name. However when we notify the Japanese government, will I have to change my registered name in Japan?