I have never had success with cuttings from a Jap Acer but they grow wonderfully well from their seed. When the seed appears, looking much like that of a sycamore, pick and plant in pots straight away. They grow really easily. However, they don't grow 'true' from seed but you can get some interesting versions. Good luck.

None of our Japanese acers has ever flowered or seeded. I wouldn't want to try growing them from cuttings personally, shrubs yes - trees no, but that is just me.

wot about grafting .

Doable if you have a scion to graft onto