The Kosuiji Shiba clan was such a distinguished family that it was referred to as the honorific titles like 'Shiba-gosho' and 'Oku no Shiba-dono' and was on the same level as the Osaki clan in the Shosatsurei (Remarks on the Concept of Epistolary Etiquette).
高水寺斯波氏は、名族であることから「斯波御所」「奥の斯波殿」と尊称され、書札礼でも大崎氏と同格であった。