Pyong

A tsubo (or pronounced as in Korean, in Chinese) is a unit of the size of rooms or buildings in Japan, Korea, and Taiwan equal to 36 shaku2 (shaku is Japanese foot and 10⁄₃₃m. in Korea, it is called as 자(ja)) or 400⁄₁₂₁ square metres (3.3058 m2, 3.954 sq yd or 35.586 sq ft) and with the same symbolic word "坪". This unit is derived from Chinese Zhou Dynasty '歩' unit.