The muskmelons that go for hundreds of dollars exists in Japan. If you go to a fancy restaurant, like Sukiyabashi Jiro, you may get it for dessert. I should say, if you are lucky and have a nice friend who treats you to dinner at Sukiyabashi Jiro.
The muskmelon is amazing. Aromatic, juicy, and tender, and the most amazing piece of fruit that I have ever had. But, it is possible to try a few bites of the infamous melon without breaking your wallet. Check out the fruit dessert counter at any depachika. Cakes, tarts, and much more topped with pristine, blemish-free fruit cut into bite-size pieces. The muskmelon balls are above.
More muskmelon, figs, and grapefruit.
Marron, mango, apple pie, and more.
Top left is the Mont Blanc made with chestnuts.
Some department stores have small eat-in counters in the depachika to have a glass of fresh juice or a slice of melon. Or, some shops, like Shinjuku Takashimaya, have a larger café on an upper floor. Takano Fruit Café in Shinjuku Takashimaya. Some famous fruit shops include Sembikiya, Takano, and Lemon.
Sembikiya Nihonbashi (Japan’s oldest fruit shop)
Food Sake Tokyo 