"Ochikubo monogatari" is a tale of from Japan's Middle Ages that precedes "Genji Monogatari" (The Tale of Genji) and is also mentioned in "Makura no Soshi" (the Pillow Book).
『落窪物語』は『源氏物語』に先立つ中古の物語で、『枕草子』にも言及がある。