These units were introduced in Japan, and o-shaku (a large shaku) and sho-shaku (a small shaku) were enacted in the Taiho Ritsuryo (the Code of Taiho) established in 701.
それが日本に導入され、大宝(日本)元年（701年）の大宝律令で大尺・小尺を制定している。