Traditional Japanese units

Traditional Japanese units

Sep 21 2020

There is a traditional Japanese unit for measuring length, "sun". Officially, it was changed to the meter by law in 1951, but it is still used in various occasions.
A "1-sun" is about 30.3 mm.
It is often used to describe the length of the blade of a traditional knife.
The Higonokami in this photo is a "2-sun 5-bu", about 76mm long.
This ruler was my grandmother's possession, and it has "centimeters" and "sun" on the front and "inch" on the back, which is a rare piece of ruler that no longer exists