Wikipedia defines Tanuki Bonsai as a technique where a living tree is joined to an
interesting piece of deadwood to create a composite in the
driftwood style. It goes further to state that the deadwood usually has the form of a weathered tree trunk. The tree is attached to the deadwood by making use of screws, clamps or wire. Over time, the tree will grow into the channels created and in so doing will disguise the fact that it is a separate entity.
In Japanese folklore, Tanuki, the Japanese raccoon-dog. are shape-changing tricksters. It is also known as Phoenix-grafts in the West. Personally, I think it is a good artistic technique to either enhance a piece of deadwood or a tree. There is no difference in attaching a tree to a rock compared to attaching a tree to a piece of deadwood. I had to try my hand at this. My experience is written up below.
I first had to find the right tree. I decided on a young Juniper with a lot of flexibility. The next project was to find a suitable, characterful piece of deadwood. I managed to get a piece on the beach. A note of warning is needed here. If driftwood from a beach is used, it is important to get rid of all salt on and in the wood. I submersed the wood for three weeks in fresh water and regularly changed the water as well as used a high pressure stream of water and scrubbing on it. It was then left in the sun for another week. The third component was a pot selected from my pot collection.
The first job on the pot was to get enough tie wires in place as the deadwood and tree must be secured very firmly. It is wise to get a hardener on the deadwood. I treated it with lime sulphur as the bottom part will be in the wet soil. I have read that the end could also be placed on a solid object like a tile to minimise the part in contact with the soil. My first challenge was to drill extra holes in the pot. For the first time in my life, I had a pot which is so hard, that the drill bit did not even make an indentation on the pot. The tie wires therefore had to be attached through the drainage holes.
The next phase was to ensure a flat structure at the bottom of the deadwood to make it stand more solidly in the pot. This was done by simply determining the angle, marking the wood and using a handsaw to make the cut. Next I had to drill holes into the deadwood for the tie wires. Advice found was to use a router to create channels in the deadwood. This was not necessary on this piece as it had natural channels that could be used for the tree to be placed in snugly.
The tree was now prepared by preparing the roots and cleaning up the trunk. It was put in place starting at the bottom and fixing it to the deadwood with non-reacting (copper) thin screws. I pre-drilled the tiny holes as the tree is very thin in places and did not want it to split. Branches which came in the way of this process were removed. I decided to leave the growth at the top as is as I did not want to stunt the growth too much at this stage. The whole idea is that the trunk fattens up to secure itself into the channels and adhere to the deadwood. Branches were wired and now the maintenance work of feeding and watering begins. No pruning will take place until the two entities become one (hopefully).
Cheating or a legitimate technique? You decide! I found a reference on bonsainut.com that mentioned that Masahiko Kimura designed Tanuki and it also mentioned that John Naka once threw one out of a display and told the owner to go and get a real Bonsai. I will update this post as the Tanuki showed here progresses.