Don't wait too long though! Because then they get a soft jammy texture that some people absolutely hate. Transitioning into full goo eventually. (Yes that's the case for fuyu too, not just hachiya).

Also some fuyu can still be astringent when very firm / underripe.

Put it in a blender. Lemon juice optional. This will destroy the slimy texture. Fill a glass with the mix and then add cream on the top and you will have a spectacular dessert.

Persimmons are three (four?) totally different fruits in one.