tsubo; traditional unit of land area
A traditional Japanese unit of area equal to one square ken (about 3.31 m²). Used in real estate and land measurement contexts.
This plot of land is about fifty tsubo.
Compound of 平 (flat) and 坪 (tsubo, a unit of area). The prefix 平 may emphasize the two-dimensional area measurement, contrasting with 立て坪 (cubic tsubo).