I visited Tokyo for couple weeks around the New Years Day and would like to share Delta Airlines now offers a direct flight from Minneapolis to Haneda Airport.
Haneda Airport is located near the downtown and much closer than Narita Airport (about 45 miles away).
Haneda Airport expanded runways and accepted more international flights as well as domestic flights.
Someone posted several photos of Delta 121 landing and taking off the airport, and I thought you would enjoy the website.