I see, the evil groundhog.
The tree won't break, definitley not. I have seen people bending a tree from 4-5 cm thick with no problem. If you're really scared of bending it too far you could use raffia but with the shape you already have, you could go for semi cascade. Ofcourse you could go for fukinagashi, I don't say it is impossible it is just very difficult to create a natural effect .