The freezing field is surrounded by shelter hedges about 1.8 m high, where stakes about 50 cm long are piled on the east and west ends to support crossbars on which straw mats with tokoroten jelly are laid to freeze in the cold night air.
凍結場は、周囲に高さ1間ほどの防風垣を立てめぐらせ、東西に杭（高さ50cmくらい）を打ち、横木を渡し、その上にトコロテンを並べた蓆を置き、寒い夜に凍結させる。