He had prominent connoisseurship, and the collection of swords selected from among those particularly striking his fancy, which is called '上杉景勝御手選三十五腰', includes many national treasures and important cultural properties.
卓越した鑑定眼を持ち、特に気に入ったものから選抜した「上杉景勝御手選三十五腰」と呼ばれるコレクションには国宝や重要文化財が多数含まれている。