I visited the Aomori Gyosai Center and enjoyed Nokke-don which is a process where you have a do-it-yourself bowl of rice topped with fish and seafood of your choosing. There are numerous blogs describing this. Do a search like this and you will see many entries.
The google maps street view is here
Very heavy snow on the day I went.
Buy these tickets and load up your bowl of rice.
Typical vendor selling fish.
The market looks like this.
I had a few coupons leftover so I got some o-toro. Incredibly fresh and delicious.