Wood Working/Joining Two Beams
Measure twice - Cut once. lol
Traditional Japanese wood working is an honored skill. Over the years I've accumulated a number of traditional Japanese hand tools, and have found that in many occasions, they are THE tool needed to get various things done.
I have a well equipped wood shop, with a lot of stationary and and hand held power tools. It's amazing how often I STILL revert to using hand tools.
The workman ship shown in your videos is impeccable and clearly demonstrates the value of their "apprenticeships" over our trade schools.