The title of this chapter was derived from the waka poem that To no Chujo (the first secretary's captain) composed: "New leaves of wisteria in the sunlight of spring; if you open your heart to me, I will place my trust in you."
巻名は頭中将が詠んだ和歌「春日さす藤の裏葉のうらとけて君し思はば我も頼まむ」に因む。