noun
one-tenth hectare; approx. 991.74 m²
Traditional Japanese unit of land area, still used in agricultural and real estate contexts. One 反 (tan) is about 991.74 square meters.
この田んぼは一反の広さです。
This rice paddy is one tan in area.
一反の土地を買うにはいくらかかりますか。
How much does it cost to buy one tan of land?
From the traditional Japanese land measurement system. 反 (tan) is a unit of area, and 一 means 'one'.