Do we need VISAs? We do not have 2 blank pages in our passports.

My husband and I have plans for a trip from Tokyo to Hong Kong on Princess Cruise lines. We will be in Taiwan Monday October 20, 2014 and in Hong Kong October 22-25. Will stay in a hotel in Hong Kong, but have not finalized arrangments yet. If it is necessary, will they issue on extra pages we get added to our US passports ?

Suzie