This Japanese title, "Kudensho," which literally means "orally transmitted words," was given because Kakunyo wrote the book based on his notes of the oral teachings of Joshin, who was the grandson of Shinran (founder of the Jodo Shinshu).
覚如が、親鸞の孫にあたる如信より口授された教義を記したことから、この名が付けられた。