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Every unit in this category. Click a value to copy it.
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How many square meters is a plot measured in tsubo? How many milliliters is the "2 go" of rice in a recipe? How long is a shaku ruler in centimeters? In Japanese real estate, traditional rooms, sake, kimono, fishing, and antiques, the shakkanho units are still very much alive, and converting them to metric is a recurring chore. This Japanese units converter lets you pick a family — length, area, volume, or weight — enter a single value, choose its input unit, and instantly see every unit in that family side by side, both traditional (tsubo, tatami, tan, se; shaku, sun, ken, jo, ri; go, sho, to, koku, shaku; monme, kan, kin) and metric (m, cm, ㎡, L, ml, g, kg). The conversion factors use the exact ratios defined by Japan's Measurement Act (1 shaku = 10/33 meter, 1 tsubo = 400/121 square meter, 1 sho = 2401/1331 liter, 1 monme = 3.75 gram) internally, rounding only for display, so tsubo⇄㎡, go⇄sho, shaku⇄cm, and monme⇄g all stay accurate. Tatami sizes vary by region (Kyoto, Chukyo, Edo, and apartment sizes), but this tool uses the official shakkanho conversion of 1 tatami = 1/2 tsubo. Click any converted value to copy the plain number without grouping, ready to paste into a spreadsheet or document. The number you enter is never sent to any server; everything is computed entirely inside your browser.
How to use
- Choose the family you want to convert: length, area, volume, or weight.
- Enter a value and pick its unit. For example, in area type "3" and set the input unit to tsubo.
- Every unit in the same family appears at once. Click any value to copy the plain number.
FAQ
Is the number I enter sent to a server?
No. The whole conversion runs inside your browser; the number you enter is never uploaded, stored, or transmitted. It works fully locally.
How many square meters is one tsubo?
One tsubo is about 3.305785 square meters (exactly 400/121 ㎡); conversely one square meter is about 0.3025 tsubo. This tool uses the exact ratio defined by the Measurement Act and rounds only for display, so converting tsubo⇄㎡ back and forth stays consistent. One tsubo also equals two tatami.
I've heard tatami sizes differ by region — which one is used?
Yes — actual tatami mats differ in size between the Kyoto, Chukyo, Edo, and apartment standards. This tool uses the official shakkanho conversion of 1 tatami = 1/2 tsubo (about 1.6529 ㎡). If you need the physical dimensions, check the tatami standard for your specific region.
How many milliliters is one go of rice?
One go is about 180.39 ml (a tenth of a sho); a single rice-cooker measuring cup is roughly one go. One sho = 10 go ≈ 1.8 liters, one to = 10 sho ≈ 18 liters, and one koku = 100 sho ≈ 180 liters.
Is the kin here the same as a loaf of bread?
No, they are different. The kin in this tool is the shakkanho weight unit, where 1 kin = 160 monme = 600 grams. The "1 kin" loaf of bread follows a separate packaged-bread trade convention of at least 340 grams (usually around 340–400 grams). For weight conversion this tool uses the shakkanho 600 grams.