There are several ways of getting around Naha City in Okinawa. There are numerous taxis, which is a convenient place to get to your destination without walking. However, the Yui Monorail connects many popular sites, including Naha Airport, Kokusai-dori, and Shuri Castle. Multiple bus companies run different routes throughout the city. Maps are not in English, so it is a good idea to plan your trip online or with the help of a hotel concierge before riding one.
There are several discount tickets that are useful for sightseeing. There is a monorail pass good for unlimited rides on one day for 600 yen, or 300 yen for children 6 to 12 years old. There is a two-day monorail pass for 1000 yen, or 500 yen for children. In addition, there is a bus and monorail pass that permits unlimited rides on any route that originates within the city of Naha for 1000 yen for one day. Children 6 to 12 years old can get this special pass for 500 yen. The combination bus pass can be purchased on any Naha bus.
For more information on transportation in Naha: http://www.okinawatraveler.net/transportation_public.html