In Japan, 20ᵗʰ century, a unit of length used for cloth, 3²⁶⁄₃₃ millimeters (that is ¹²⁵⁄₃₃). A bu (100 bu = 1 shaku) according to the kujira shaku standard.
United Nations, 1966.
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Last revised: 8 March 2008.