Do we need a visa for a one day cruise stop in Shanghai ending in Hong Kong with 3 nights stay?

Asked by Louanne July 29, 2016 Trip starts with 2 hotel nights in Tokyo, then cruise leaves and visits on one day stops to Taipei, Okinawa, Shimizu, Kobe, Nagasaki, Shanghai and ends in Hong Kong with arrival on Saturday {stay on board for the evening} - to the hotel on Sunday for 2 nights in a hotel and then leave back to the US on Tuesday. I am a US citizen with a passport.