Pruning

Question

I have a Katsura tree that someone pruned the center out of how can I re-establish its shape. It now has several long spikes but not true center and an empty space on the side.

Answer 1

Pruning to repair it's shape may take some time over a few seasons.
Here is an article that may help you.

https://www.gardeningknowhow.com/ornamental/trees/katsura/japanese-katsura-tree-care.htm