This fifteenth-century Dōmaru Armor with Blue Lacing has long been renowned for its refined coloration and classical appeal, as evidenced by its inclusion in the book of celebrated artworks, Shūko jisshū (Collected Antiquities in Ten Categories), published in the year 1800 by the daimyo connoisseur Matsudaira Sadanobu. Armor is inherently a composite art form, comprising not only metal fittings, but also silk braided cords, woven silk textiles, lacquer, and leather. As some of these organic materials exhibited pronounced signs of degradation, the conservation of this armor was essential for it to be passed on to future generations. It is being exhibited for the first time following the completion of a monumental conservation project.