This armpit guard was found in a storage chest for Muneshige's armor. It was made of iron and covered with chestnut leather. The form shows the old style armpit guard of the mid-16th century, while the Maki-e design shows the feature of Kodaiji style which was popular in the 16th-18th century. The motif of the Maki-e design depicts a talisman of Gion-sha shrine being tied to branches of the cedar trees. It expresses the prayer for divine protection and proves Muneshige's Gion Faith. It is also the oldest material related to the origin of the Tachibana family’s crest ‘Gion-mamori’.