Sapporo is the capital of Hokkaido. The city itself is not really beautiful, but is an excellent base for exploring the rest of the island. It has more nightlife than any other city north of Tokyo. The Susukino district has countless bars, nightclubs and hostess bars. During winter the Sapporo snow festival attracts visitors from all over the country to see the huge (15 to 20 meters high) snowsculptures that are on display all over Odori Park. You can rent cross country skis for free in Nakajima park.
