These utensils are made of shakudo which is a high-quality alloy of gold and copper. They have crest design of Mitsuba-aoi which is the Tokugawa family crest. Therefore, they are considered to be one of the wedding trousseau of Princess Sumi. She came as a bride of the 12th lord of the Yanagawa domain, Tachibana Akitomo, from the Tayasu Tokugawa family.
Until recent years, the Tachibana family had used them at the ceremony of offering tea to the deities of Mihashira-jinja Shrine.