1. Beer.

Sapporo BeerIt's owned by Suntory. (Who also make pretty good whiskey).

There are also a number of craft beer brewers in Hokkaido.

2. Seafood. Lots of crab and other seafood up there.

3. Ita-taku Ita-sha Taxis

Newest fad to hit Japan. And seems to bring in the revenue for the depressed taxi industry.