If you could shoot some photos from 360* around the tree you might be surprised what some could see. I would not at this point be swift to cut anything. When you start with a Yamadori you must, in the end, have a tree that indeed reveals itself as such.
If I were to remove anything significant it would be more like the right side and doing so by making it into jin. This tree has a sling shot configuration problem and I think you can see it. Jinning the left side would look awful, like a stick, sticking out for no reason. You would be just as well cutting it very short or flush. Jinning the right side would look more natural as though the tree had suffered disaster and regrew on the left side.
In doing this you will have to carefully and aggressively wire the branching on the left side into a more of a tree shape giving evidence that the tree happened to look like this naturally. You will also have to incline the tree a bit more to elevate the left side of the tree and lower the now jinned out remains of the Right side of the tree. All of this is just my opinion and if you are having trouble in seeing what I am saying; it would probably be better if you left the tree alone till you have a good vision for it that you do see, and believe in. People have made in the past the assertion that the best material to start learning bonsai with are Yamadori trees. I disagree with this claim. Yamadoris are trees that are, in most cases, in excess of fifty years old and as such should be treated with intelligent design and respect. I find the hack and slashing to see what might happen with no idea for the future almost inexcusable.