Great to see how Mr. Yamamoto seeks to work with nature, from the way they produce wooden barrels, to the their whole philosophical outlook on the whole process. We can see some similiarities between the processes he uses and the permaculture principles we have learnt.

"The soy sauce is not made by me, but by the bacteria. I only help out. My job is to maintain this ecosystem,” Yamamoto said.

http://www.bbc.com/travel/gallery/20190225-a-750-year-old-japanese-secret