Tosa Nikki (The Tosa Diary): A diary written in Hiragana detailing his trip after completing his mission as Tosa no kami (the Governor of Tosa Province), in which he impersonated a woman.
土佐日記：紀貫之が土佐守の任務を終えて帰る旅の途中のことを女性を装って平仮名で書いている。