These were used for the exorcism of ogre at the tsuina no shiki (ceremony of driving out evil spirits) held at the Imperial Court on New Year's Eve, and the former was made of reed stem and the latter was made from a peach tree.
大晦日に朝廷で行われた追儺（ついな）の式で、鬼を祓う為に使われた弓矢の事で、それぞれ葦（アシ）の茎と桃の木で出来ていた。