I have a Kiyo Hime Japanese Maple that came from nursery stock - bought at a local nursery on an end-of-year sale. The tree had some damage, however, I thought it was due to breakage. Since I wanted the tree for bonsai, that was not a deterrant to purchasing it. The tree has been transplanted to another pot with better drainage, but it has become apparent that there is something else going on with the tree. The tree has serious dieback and the bark is damaged in several different places and some of the new growth has withered. I'm wondering if anyone else has had a Japanese Maple with those symptoms and also if this is due to a disease or perhaps a boar or beatle within the trunk. I would like to keep the tree because of it's variety, however I don't want it to infect my other trees. I haven't been able to find any information on diseases that attack Japanese maples in this way. If anyone has any suggestions on how to treat this tree, please let me know. Thanks so much.