🏯 Shakkanhō Japanese Units
Traditional Japanese unit converters: shaku and sun length, tsubo, bu and tan area, sho, go, to and koku volume, kan and momme weight.
The traditional Japanese system — shakkanhō — still lives in real estate floorsplans (tsubo, tatami), sake bottles (sho, go), pearls (momme) and traditional trades.
Each converter handles one family with exact modern legal definitions, and an all-in-one shakkanhō converter ties the whole system together with metric equivalents.
Bu Area Converter
Enter bu (歩) to convert to square meters, square feet, tsubo, and tatami. 1 bu = 1 tsubo = 3.306 m2. Traditional unit for land and fields.
Cho Area Converter
Enter cho (町) to convert to hectares, acres, square meters, and tan. 1 cho = 10 tan = 9917.4 m2, approximately 1 hectare.
Go Volume Converter
Enter go (合) to convert to milliliters, liters, US cups, and fluid ounces. 1 go = 180.39 mL. Standard unit for sake and rice measurement in Japan.
Kan Weight Converter
Enter kan (貫) to convert to kilograms, grams, pounds, and momme. 1 kan = 1000 momme = 3.75 kg. Traditional unit for bulk goods and precious metals.
Ken Length Converter
Enter ken (間) to convert to meters, feet, shaku, and sun. 1 ken = 6 shaku = 1.818 m. Standard module in traditional Japanese architecture.
Koku Volume Converter
Enter koku (石) to convert to liters, gallons, sho, and go. 1 koku = 180.39 L = 100 sho. Historical rice stipend unit from the Edo period.
Momme Weight Converter
Enter momme (匁) to convert to grams, carats, ounces, and kan. 1 momme = 3.75 g. Standard unit for pearl weight and Japanese precious metal trading.
Shakkanho Unit Converter
One-stop converter for all shakkanho units: shaku (length), tsubo (area), kan (weight), sho (volume), and more. Convert traditional Japanese measurements to metric instantly.
Shaku & Sun Length Converter
Enter shaku (尺) or sun (寸) to convert to centimeters, inches, and meters. 1 shaku = 10 sun = 30.3 cm. Choose kane-jaku or kujira-jaku standard.
Sho Volume Converter
Enter sho (升) to convert to liters, milliliters, US gallons, and go. 1 sho = 1.8039 L (standard isshobin sake bottle).
Tan Area Converter
Enter tan (反) to convert to square meters, acres, hectares, and tsubo. 1 tan = 300 tsubo = 991.7 m2. Standard Japanese farm land measurement unit.
Tatami Area Calculator
Enter the number of tatami mats (jo) to instantly calculate room area in square meters, square feet, and tsubo. Supports Edoma, Kyoma, and Danchima tatami sizes.
To Volume Converter
Enter to (斗) to convert to liters, US gallons, sho, and koku. 1 to = 10 sho = 18.039 L. Traditional Japanese bulk volume unit for rice and liquids.
Tsubo Area Converter
Enter tsubo (坪) to instantly convert to square meters, square feet, acres, hectares, and tatami mats. 1 tsubo = 3.3058 m2.
Frequently asked questions
Is shakkanhō still used in Japan?
Yes, alongside metric: property listings quote tsubo, sake comes in sho and go, and pearls are traded in momme — the pages cite the modern legal values.
How do tatami and tsubo relate?
A tsubo is the area of two standard tatami mats; the calculator converts between tatami counts, tsubo and square meters.
What does the all-in-one converter cover?
Length, area, volume and weight families in one view, so unfamiliar combinations like koku of rice or ken of room width convert directly.