Not sure about Japanese maples but some maples will root through cuttings. The PNW native vine maple (Acer circinatum) easily grows from cuttings. In the fall I accidently cut a branch off one that I have growing along my
fence line while trying to remove some overgrown blackberries. I just stuck it in the ground and walked away - now it has fresh shoots and is getting ready to leaf out. Reading other sites and this seems common for vine maples. Potentially vine maple is the exception to the rule but it might also indicate that other maples would also be able to root from cuttings.