In addition, in the "Nanboroku" there is a description that 'During the period of Joo, yojohan zashiki had been partially improved, replacing haritsuke (fixed walls which are pasted paintings on paper) to tsuchikabe (clay wall), wooden latticework to one of bamboo, and the Koshiita (baseboard wood paneling and finishing trims) of Shoji has been removed, and toko is covered with a thinner coating or plain wood, and the room with the interior above is called "Kusa no Zashiki" (hut of grass; tea hut).'
『南坊録』には更に「紹鴎になりて、四畳半座敷ところどころ改め、張り付けを土壁にし、木格子を竹格子にし、障子の腰板をのけ、床の塗りふちをうすぬり、または白木にし、之を草の座敷と申されしなり」とある。