One of my school’s English teachers’ hobby is growing fruit. He has about 30 varieties of citrus trees and several other kinds of fruit too. He also grows a vegetable garden. About 2 weeks ago, he brought in these strange-looking fruits – yamamomo. They’re about 2 centimeters across and quite bumpy, with a fairly large pit in the center. The flavor is sweet and sour, with a distinct floral note. I recognized them as the same fruits that I had tried at the Obanzai restaurant in Kyoto during spring break. The one I had in Kyoto had been preserved in syrup or liquer, so it was quite sweet, but with the fresh ones, the sour taste definitely dominated over the sweet.
I am not sure if they are available outside of Japan; I certainly had never seen one before I arrived here. As with most (all?) Japanese homegrown fruits, yamamomo are quite seasonal, I suppose the season is probably already over.