An acre is about 4 tan 10 bu or 1,200 bu or tsubo (an urban measure).  The size of rooms is reckoned by the number of mats, which are ordinarily 6 shaku in length and 3 shaku in breadth.

CAPACITY

Koku (roughly 40 gals, or 5 bush.) = 39.703 gals, or 4.960 bush. = 10 to.  According to American measurements, there are 47.653 gals, (liquid) and 5.119 bush, (dry) in a koku.  A koku of rice is 313-1/2 lbs.  (British).

A koku of imported rice is, however, 330-1/2 lbs.  The following koku must also be noted:  ordinary barley, 231 lbs.; naked barley 301.1 lbs.; wheat 288.7 lbs.; proso millet, 247.9 lbs.; foxtail millet, 280.9 lbs.; barnyard millet, 165.2 lbs.; brickaheat, 247.9 lbs.; maize, 289.2 lbs.; soya beans, 286.5 lbs.; azuki (red) beans, 319.9 lbs.; horse beans, 266.6 lbs.; peas, 306.5 lbs.

Hyo (roughly 2 bush.) = 1.985 bush. = 4 to = bale of rice.

To (roughly 4 gals, or 1/2 bush.) = 3.970 gals, or .496 bush, or 1.985 pecks = 10 sho.

Sho (roughly 1-1/2 qts.) = 1.588 qts. or 0.198 pecks or 108-1/2 cub. in. = 10 go.

Go (roughly 1/3 pint) =.3176 pints or 0.019 pecks.

Rice is not bagged but baled, and a bale is 4 to or 1 hyo.

WEIGHT

Kwan or kwamme (roughly 8-1/4 lbs.) = 8.267 lbs. av. or 10.047 lbs. troy = 1,000 momme.

Kin (catty) = 1.322 lbs. av. or 1.607 troy = 160 momme.

Momme = 2.116 drams or 2.411 dwts.  According to American measurements a momme is 0.132 oz. av. and 0.120 oz. troy.

Hyakkin (picul) = 100 kin = 132.277 lbs.

A stone is 1.693, a cwt. is 13.547, and a ton 270.950 kwamme.

LOCAL ADMINISTRATIVE TERMS

Ken.—­Prefecture.  There are forty-three ken and Hokkaido.  Ken and fu are made up of the former sixty-six provinces.  Sometimes the name of the ken and the name of the capital of the ken are the same:  example, Shidzuoka-ken, capital Shidzuoka.

Fu.—­Three prefectures are municipal prefectures and are called not ken but fu.  They are Tokyo-fu, Kyoto-fu and Osaka-fu.

Gun (kori).—­Division of a prefecture, a county or rural district.  There are 636 gun.  Gun are now being done away with.

Shi.—­City.  There are seventy-nine cities.

Cho.—­A town or rather a district preponderatingly urban.  There are 1,333 cho.

Machi.—­Japanese name for the Chinese character cho.

Son.—­A village or rather a district preponderatingly rural.  There are 10,839 son.

Mura.—­Japanese name for a Chinese character son.