After stacking two layers of firewood, the second layer is surrounded by batta (a type of cypress wood) and temporarily secured with rope. The batta is made from cypress wood from the Kiso Mountains. Batta is taken from leftover parts such as those remaining after the pillars have been removed. Batta came into use around the time of World War II when firewood and split wood became scarce, but originally, thinly split Japanese red pine firewood was used.
The first layer of firewood has ropes tied in six places, and you insert a piece of bata (wooden sheet) so that it hooks onto the top rope. About fourteen pieces of bata are enough to surround the firewood.
Wrap the wooden sheets around the bat. Use a spatula to create gaps in the rope of the first bundle, and insert the wooden sheets into the gaps. About twelve sheets of wooden sheets made up one full circle. Once the sheets were in place, pound them with a board to level them, and then tightly tie the top of the sheets with rope. Furthermore, tie the center of the sheets with a second rope, and the space between the first and second ropes with a third rope.
Now, untie the ropes that are temporarily securing the second layer and add more firewood.
The torch gets thicker as you go up, so you add firewood while shaping it. Here, about twelve pieces of firewood were added.
We begin the second round of inserting the wooden planks. We insert the planks into the top rope of the first round. Once inserted, we tap it from above with a board and tie it with the rope. For the second round, we tie the planks in three places from the top.
Continue the process in the same way until the third round. Once the third round is complete, the torch will be quite tall, so prepare a stand at this point.
Stand on the platform and insert the connecting pieces. Insert four connecting pieces, then one piece of firewood, then another connecting piece, and so on, checking the overall fit as you insert the connecting pieces and firewood, and then tap them down from above with the back of an axe or something similar. Once you have inserted a certain amount, add about four thick pieces of good quality firewood, and then get down from the platform.
Insert the logs. Insert the logs so that they go behind the logs that were inserted earlier. While inserting the logs, insert any remaining logs into any gaps.
Here, eighteen pieces of bat were used to surround the structure. After inserting them, they were hammered with a wooden mallet to shape them, and then temporarily secured with rope.
The wooden strips are now on their fourth rotation. The torch has gotten quite thick, so fifteen strips of wood were used to complete one rotation. Sixteen strips of wood were used for the fifth rotation. It becomes difficult to maintain balance as you get higher. Tying it with rope makes it sway.