Fruit Gardens in Tsukuba
There are at least 34 fruit gardens in Tsukuba where you can buy fruits such as apples, blueberries, cherries, figs, grapes, peaches, pears, persimmons, and plums directly from the source. Some gardens also allow you to pick you own.
Tsukuba City Hall has published a map of fruit gardens in Tsukuba (only available in Japanese). The gardens are marked with the character “観” if you can wander through the gardens and pick your own and “直” if you can buy the fruits directly from the garden.