The Japanese were great leather workers, not just in armor but also in clothing, horse related items, storage containers and leather covers for various items, here are a few examples.
A pair of gloves "yugake" that would be worn with armor, made from soft deer leather, with stenciled designs.
A war hat "jingasa'' made from hardened leather
A pair of shoes "kutsu" made from tough leather with small iron pieces attached to the soles.