The Kaki fruit is very rich in tannins, particularly when not 100% ripe, so its not really a fruit you should eat in abundance.
Also, when a food is claimed to have many medicinal properties, you should be cautious by definition, as this means that it contains substnaces that may interfere with metabolism(s) in our body, which may have adverse effects.
Sun dried kakis contain far less tannins.
Tannins have toxic properties. Tannins used to be applied to rid the skin of dead animals from remaining connective tissue, to yield leather.
Some people react adversely to small amounts of tannins (rashes), but if the fruit is perfectly ripe, consuming it may pose no problem whatsoever. At least it tastes absolutely delicious when perfectly ripe.
Lychees and rambutan are fine indeed.
Do you think there could be any adverse effects the way they treat the Sharon Fruit with CO2. I had a link to a webpage that went into a little bit more depth the method they use. But, sadly, i can no longer find it.
How do you determine whether the persimmon is ready to be eaten? Does the fruit have to be soft everywhere - the top, bottom and the sides? I just ate a persimmon where its sides were soft but the bottom were hard.