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*1 '''Ata''' (咫) = 18 cm
*1 '''Ata''' (咫) = 18 cm
*1 '''Shaku''' (尺) = 30.3 cm
*1 '''Shaku''' (尺) = 30.3 cm
*1 '''Ken''' (間) = 1.8182 m
*1 '''Ken''' (間) = 1.8182 m<ref>One ''ken'', sometimes translated as one "bay," was the traditional standard amount of space between a building's pillars. The length of a building is often given in ''ken''; the famous [[Sanjusangendo|Sanjûsangendô]], or "Thirty-Three Bays Hall," in Kyoto indeed has thirty-four pillars along its side, resulting in a hall thirty-three "bays" in length.</ref>
*1 '''Jô''' (丈) = 3.03 m
*1 '''Jô''' (丈) = 3.03 m
*1 '''Chô''' (町) = 109.9 m
*1 '''Chô''' (町) = 109.9 m
*1 '''Ri''' (里) = 3,927 m<ref name=rilength>The length or distance defined as one ''ri'' has changed dramatically over time. Though at times it was equivalent to 36 ''chô'', or roughly 3.9km, in certain earlier periods of history one ''ri'' was equivalent to six ''chô'', or roughly 0.65 km.</ref>
*1 '''Ri''' (里) = 3,927 m<ref name=rilength>The length or distance defined as one ''ri'' has changed dramatically over time. Though at times (including in the Edo period) it was equivalent to 36 ''chô'', or roughly 3.9km, in certain earlier periods of history one ''ri'' was equivalent to six ''chô'', or roughly 0.65 km. Meanwhile, in early modern Korea, they used the same character (里, K: ''ri'') to refer to a distance roughly 1/10th that of the Japanese ''ri'': roughly 400 meters, rather than 4 km. Miyake Riichi, ''Edo no gaikô toshi'', Kashima Shuppankai (1990), 71.</ref>
*1 Traditional '''Ri''' (里) = 654.6 m<ref name=rilength/>
*1 Traditional '''Ri''' (里) = 654.6 m<ref name=rilength/>
*1 '''Bu''' (歩) = 1 '''Tsubo''' (坪) = 3.306m<sup>2</sup>
*1 '''Bu''' (歩) = 1 '''Tsubo''' (坪) = 3.306m<sup>2</sup>
*1 '''Se''' (畝) = 99.17m<sup>2</sup>
*1 '''Se''' (畝) = 99.17m<sup>2</sup>
*1 '''Tan''' (反・段) = 991.7m<sup>2</sup><ref name=hideyoshi>Prior to [[Toyotomi Hideyoshi]] decreeing a new standard in [[1598]], one ''tan'' was equal to 360 ''bu'' instead of 300 ''bu'', and was therefore roughly equal to 1,190.4m<sup>2</sup> instead of 991.7m<sup>2</sup>. One ''chô'' was still ten ''tan'', making ''chô'' at that time equal to roughly 11.904km<sup>2</sup>.</ref>
*1 '''Tan''' (反・段) = 991.7m<sup>2</sup><ref name=hideyoshi>Prior to [[Toyotomi Hideyoshi]] decreeing a new standard in [[1598]], one ''tan'' was equal to 360 ''bu'' instead of 300 ''bu'', and was therefore roughly equal to 1,190.4m<sup>2</sup> instead of 991.7m<sup>2</sup>. One ''chô'' was still ten ''tan'', making ''chô'' at that time equal to roughly 11.904km<sup>2</sup>. In theory, a ''tan'' of land produced one ''koku'' of rice, and a ''chô'' of land produced ten ''koku'' of rice.</ref>
*1 '''Chô''' (町) = 9.917km<sup>2</sup><ref name=hideyoshi/>
*1 '''Chô''' (町) = 9.917km<sup>2</sup><ref name=hideyoshi/>
===Unit Conversions===
===Unit Conversions===
*1 '''Bu''' (歩) = 1 '''tsubo''' (坪) = 10 '''gô''' (合)
*1 '''Bu''' (歩) = 1 '''tsubo''' (坪) = 10 '''gô''' (合) = a 1 ''ken'' x 1 ''ken'' square = 2 [[tatami]] mats placed together<ref>Arne Kalland, ''Fishing Villages in Tokugawa Japan'', University of Hawaii Press (1995), ix.</ref>
*1 '''Se''' (畝) = 30 '''bu''' (歩) = 30 '''tsubo''' (坪)
*1 '''Se''' (畝) = 30 '''bu''' (歩) = 30 '''tsubo''' (坪)
*1 '''Tan''' (反・段) = 10 '''se''' (畝)<ref name=hideyoshi/>
*1 '''Tan''' (反・段) = 10 '''se''' (畝)<ref name=hideyoshi/>
===Metric Equivalents===
===Metric Equivalents===
*1 '''Momme''' (匁) = 3.75g
*1 '''Momme''' (匁) = 3.75g
*1 '''Kin''' (斤) = 600g
*1 '''Kin''' (斤) = 600g<ref>The ''kin'' (C: ''jīn'') is also commonly known as a "catty" in English-language materials (e.g. "400 catties of copper").</ref>
*1 '''Kan''' (貫) = 3.75kg
*1 '''Kan''' (貫) = 3.75kg
*1 '''Kin''' (斤) = 160 '''momme''' (匁)
*1 '''Kin''' (斤) = 160 '''momme''' (匁)
*1 '''Kan''' (貫) = 1000 '''momme''' (匁)
*1 '''Kan''' (貫) = 1000 '''momme''' (匁)
*1 '''Tan''' (担) = 100 ''kin'' (斤)<ref>The ''tan'' is also commonly known as a "picul" in English-language materials.</ref>
==Volume==
==Volume==
*1 '''Shô''' or '''Masu''' (升) = 1.804 liters
*1 '''Shô''' or '''Masu''' (升) = 1.804 liters
*1 '''To''' (斗) = 18.04 liters
*1 '''To''' (斗) = 18.04 liters
*1 '''Koku''' (石) = 180.4 liters
*1 '''[[Koku]]''' (石) = 180.4 liters
===Unit Conversions===
===Unit Conversions===
*1 '''To''' (斗) = 10 '''shô''' or '''masu''' (升)
*1 '''To''' (斗) = 10 '''shô''' or '''masu''' (升)
*1 '''Hyô''' (俵) = 1 "bale" or "bag" of rice = 4 '''to''' (斗)
*1 '''Hyô''' (俵) = 1 "bale" or "bag" of rice = 4 '''to''' (斗)
*1 '''Koku''' (石) = 10 '''to''' (斗)
*1 '''Koku''' (石) = 10 '''to''' (斗) = 2.5 ''hyô'' (俵)
==References & Notes==
==References & Notes==
