Travel to Kita Kanto ! One day Ashikaga Flower Park(with JR Tokyo Wide Pass)

Ibaraki is close to Tokyo, only takes 45 mins JR from Akihabara to Tsukuba. Melon is one of the famous fruit in Ibaraki and which is the leader of melon production in Japan, even more than Hokkaido area. You also can find many historical buildings and natural view here.