A quick way to burn sugi siding for a house in Okayama Prefecture, where shou-sugi-ban (焼杉板) is still quite common.
The method used is different from the method that was used to burn the cedar for our house. Take tree planks and tie into a triangle. Place on top of the fire for one minute, turn over and burn for another minute. Remove from fire, extinguish flames with water, untie the planks, and water it down. It’ll be much clearer if you watch the video. From the TV show Dramatic Before After (大改造！！劇的ビフォーアフター).
A related video of architect Terunobu Fujimori burning sugi using the same method: