Is there some technique to promote back budding? In this case on a arakawa maple.
The best way to promote back-budding is to get the tree as strong as possible, and then prune it back hard and/or defoliate it (making sure to remove the apical buds when you do so).
The horticulture behind it is that you are upsetting the balance of hormones in the tree. When you let a tree grow strong, with strong roots and strong foliage, you have elevated levels of growth hormones in the tree (in this case we are concerned with auxin from the apical buds and cytokinin from the roots). However the hormones are in balance - ie the tree is being signaled to grow foliage mass strongly and grow roots strongly. When you defoliate a tree and remove all the apical buds, or when you prune it back hard, you are upsetting that hormonal balance by removing the majority of auxin generation in the tree. If you read my article on air-layers you will know that auxins trigger root growth while suppressing axillary bud growth... and when you remove them (while maintaining elevated cytokinin levels) you are suddenly triggering a huge push in axillary bud growth. This works best if the tree is strong to begin with. The more root mass you have to start with, the higher your cytokinin levels will be, and the stronger the bud growth response when you prune back hard.
As far as I know, mechanical tools like plastic bags, etc don't do anything to promote bud growth.
One related topic about getting buds to grow where there are no buds to begin with is to scarify the tree. If you create a scar in an otherwise empty stretch of bark, the tree will respond with callous growth to close the wound. Callous growth is indiscriminate cell growth which may ultimately develop into buds, which is why you often get budding at the perimeter of large pruning scars / trunk chops.