Although Kaishu KATSU became an older step-brother of Shozan through the marriage of Kaishu's younger sister and Shozan in 1852, Kaishu did not greatly appreciated Shozan as Shozan was arrogant.
勝海舟の妹の順が嘉永5年（1852年）に象山に嫁いだので義兄となったが、傲慢な象山をあまり高く評価していない。