The act of checking with the human eye whether two lines (ink and ink, surface of the ruler and surface of the ruler) are parallel is called “niramu” (gaze). We place our trust not in the ruler itself, but in our eyes using the ruler. After all, it is still the human eye that is most reliable.
We are creating online learning materials where you can learn about Japanese carpentry in English through the actual construction of the building!
It will be on sale at the kickstarter price from November 14th to December 6th, 2021, so be sure to check it out!