If you plan on following the the sakura season (the cherry blossoms) as it progresses northwards you are probably thinking about visiting Kakunodate in Akita prefecture, one of the most famous cherry blossom viewing spots in the north of Japan. Kakunodate is famous for its hanami, or cherry blossom viewing along their beautiful river, but they are also famous for their cheap and delicious sakura ice cream ladies, skillfully creating sweets in the shape of flowers in front of the customer. I don’t remember the price but it was very cheap. Kakunodate is easily reached by the shinkansen train, and very popular with both foreign and Japanese tourists. Enjoy!