The fact that my Weeping Japanese Maples are not like the Whomping Willow of Harry Potter fame and give one shudder where all the leaves fall off simultaneously, means I have to maintain them manually.
At least the three maples in the front garden are never at exactly the same stage of development, so I can stagger the three-step procedure.
Step 1: donning suitable gloves and stripping the branches.
Step 2: using the dead leaves collected as mulch on an area of garden to help cut weeds.
Step 3: pruning the branches where needed. I find there are too many branches and some of them are growing upwards instead of downwards. Sometimes a green maple leaf will shoot from below the graft.
Occasionally branches criss-cross each other to the point where they are in a tangle, so I streamline them. When the branches are devoid of leaves, it is the best time to tackle this so you can see their exact growth habits.