平坪 ひらつぼ Meanings Noun tsubo (i.e.: traditional unit of land area, approx. 3.31 square meters) See also: 坪 (つぼ). See also: 立坪 (りゅうつぼ). Kanji 平 flat. Read as ひら. 坪 tsubo. Read as つぼ. Jinuma: Japanese Dictionary · Word lists