Japanese Fruit

[FoodieSam]

There seems to be loads of cool and unique fruit in Japan. I've put this fruit into two groups, not botanical or anything, just two groups that make sense to me.
Group 1 is fruit that you can find in other countries but that Japan has specific varieties of. This group includes kaki/persimmon, kyoho grapes, strawberries, nashi pears, melons and peaches. The strawberries especially have loads of varieties, and I didn't even know that there were really varieties of strawberries. Never thought about it.
Group two is stuff that is native to Japan, or they developed there and you can't get it in other places. This group includes ume plums (that they make those dried plums, umeboshi, from that are really sour), a whole bunch of cool-sounding citrus fruit like mikan, yuzu and shikwasa, and a really weird fruit I heard about recently called an akebi. An akebi is super weird because it's light purple on the outside, and the fruit inside looks like an alien egg, seriously. And you can even use the outside of the fruit as a vegetable.
Have you tried any of these/what are they like? Do you know any other Japanese fruit?

[Mashiiro]

I'm curious about mikan because I've always thought its just and orange, another thing that I can add on the list (well not really because I think, Korea also has this probably because they're almost neighbors) is Natsume or Jujube. I haven't eaten any of them because I haven't been in Japan but will definitely be teying to eat all the kinds of strawberries I could get my hands off because I love strawberries! Also, I'm familiar with umeboshi (because Shokugeki no Soma rocks!) and I heard that watermelons there are really expensive!