The units of cho, tan, se and bu are used for showing the acreage of fields, mountains, and forests, while the units of tsubo, go and shaku (勺) are used for the housing lots and the houses.
田畑や山林の地積には町、反、畝、歩を用い、宅地や家屋の地積には坪、合、勺を用いる。