Yes this tree has an enormous tapered root. This year I adjusted the soil line to showcase the root flair best. They were a bit too far above the soil line for my liking. That is how the nursery plants them to make them look exotic.

My indoor trees, I am learning, do best when I avoid traditional porous bonsai soil mixes. They really prefer a spongey absorbant soil to survive indoor dry air.

Looking back, I have a backlog of photos of various trees I worked on including the root pruning on this tree, which I will be able to share here.