坪

Glyph origin
.

Etymology
The Taiwanese measurement unit of area was borrowed from the Japanese one during.

Definitions

 * 1) plain ; flatland; level ground; terrace

Usage notes
The on'yomi are not used in modern Japanese.

Etymology
Cognate with. The current meaning related to area arose from the way a surrounded area with the base or floor lower than the circumference looks like a basin.

Although the reading is different, this areal measurement meaning for 坪 is shared in common with the terms in Korean and  in Taiwanese.

Noun

 * 1) A unit of areal measure, traditionally a square six  per side, equivalent to the area covered by two standard-sized tatami mats. In modern usage, standardized at 3.306 square metres.

Etymology
From.