kanejaku

曲尺 (かねじゃく)

also known as the carpenter’s measure; traditional system of measurements used in Japan from 701 CE, when it was adopted as the official units of measurement until 1924 when the metric system was adopted; in 1966, use of the traditional kanejaku system was forbidden in any official uses, but it is still being used by traditional craftsmen, including taiko makers; 10 bu = 1 sun (1.193 inch), 10 sun = 1 shaku (11.93 inches), 6 shaku = 1 ken (71.57 inches), 60 ken = 1 cho (358 feet), 36 cho = 1 ri (2.44 miles)

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