This style of armour was in use by the 12th century. Known as ō-yoroi (great armour), it incorporated many small plates of lacquered leather or iron laced together in rows. This provided the flexibility needed for fighting from horseback with sword or bow. The smooth covering of deerskin across the front prevented snagging of the bowstring. This suit of armour was re-assembled in the 19th century for ceremonial use, and a new helmet and shin guards were added. The crossed feather family crest (mon) is probably that of the Asano family.