Historical Units

尺(しゃく)

定義

日本の伝統的な長さの単位で、10/33メートル(約30.303 cm)に等しく、歴史的に中国の尺から派生した。

解説

Japan adopted the Chinese measurement system and the character 尺, but the shaku diverged slightly from its Chinese counterpart. It was divided into 10 sun, with 6 shaku making one ken (the standard room width in traditional architecture). Japan officially abolished the shaku for trade in 1891, replacing it with metric, but it persists in carpentry, textiles, and traditional arts such as shakuhachi flute making (the instrument is named after its standard 1-shaku-8-sun length).

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