How to Prune Amami maple?
Little pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. If needed, Prune only from late autumn to midwinter.

Amami maple · Acer amamiense
Grow in fertile, moist but well-drained, or well-drained soil in sun or partial shade, in a sheltered position. See tree cultivation for further advice
Little pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. If needed, Prune only from late autumn to midwinter.