酒井家は徳川氏の最古参の譜代筆頭で、徳川幕府の大老四家の一つに数えられた一族です。群馬県前橋市の龍海院と、ここ東京都葛飾区の崇福寺が墓所になっています。

The Sakai family is Tokugawa's oldest "Fudai Daimyo" (retainers who supported the Tokugawa shogunate) and is one of the four prime minister of the Tokugawa shogunate. The family's tombs are located at Ryukaiin in Maebashi City, Gunma Prefecture, and at Sofukuji Temple in Katsushika, Tokyo.