Japanese (Shakkanhō) Volume

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Equation / Last modified by Administrator on 2018/08/09 07:06
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The Japanese (Shakkanhō) Volume equation converts volumes in Japanese units to modern (Western) volumes such as litres based on conversion conventions in place since 1891. It is used to measure both dry and liquid volume.


The base unit of volume in the Shakkanhō system is the Shō. The Shō and its denominations are equivalent to the following metric measurements:

  • Sai (才) = 1.804mL
  • Shaku (勺) = 18.04mL
  • (合) = 180.4mL
  • Shō (升) = 1.804L
  • To (斗) = 18.04L
  • Koku (石) = 180.4L

Further Notes

Other Japanese units of measurement, such as those used for rice weight measurements, may share the same names as the units used for volume. Furthermore, since the Japanese language contains many homonyms some units for measuring length, area, weight and mass, are romanized in the same manner as those above, but use different kanji (Chinese characters) to distinguish between them. One example is the Shaku, which when used to measure length is written with the character 尺.