Tataki is made by adding lime and water to beaten earth such as Tenkawa-zuchi (Tenkawa earth) in Nagasaki Prefecture, Sanshu-zuchi (Sanshu earth) in Aichi Prefecture and Fukakusa-zuchi (Fukakusa earth) in Kyoto Prefecture, kneading and coating it on the floor, beating and solidifying it, and then leaving it for one or two days before finally washing away the outer surface.
長崎の天川土、愛知県三河の三州土、京都深草の深草土などの叩き土に石灰や水を加えて練ったものを塗り叩き固め、一日二日おいた後に表面を水で洗い出して仕上げとする。