Waki-Biki Yoroi (Armpit Protector)

Reinforce Your Defense Without Sacrificing Mobility

Waki-Biki Yoroi are auxiliary armor pieces worn beneath the dō (cuirass) to provide additional protection in Feudal Japan. Unlike the primary sangu (armor for the extremities), these protective inserts were developed to shield the vulnerable gap between the dō and armpit when a samurai raised their arms in combat. Initially left open for greater mobility, this area was soon recognized as a critical weak point that needed reinforcement.

To address this, waki-biki yoroi were crafted using kusari (chain armor), karuta (small rectangular or square plates), or kikkō (hexagonal plates), sewn between layers of durable fabric. This tatami yoroi (folding armor) style ensured flexibility while offering essential protection. Traditionally secured with loops or tied in place with cords, the waki-biki was worn beneath the dō, where it stayed firmly in place during combat. Iron Mountain Armory carefully handcrafts these pieces using historically accurate materials, making them ideal for restoration, reenactments, and collectors.

Key Features & Benefits:

• Authentic Historical Design: Crafted in traditional kusari, karuta, or kikkō styles.
• Enhanced Protection: Shields the vulnerable underarm area while maintaining mobility.
• Customizable Options: Choose from different materials, colors, and optional under-padding.
• Set of Two: Includes armor for both sides, ensuring full protection.
• Ideal for Collectors & Practitioners: Perfect for martial artists, reenactors, and armor restorers.

Shipping Information:

Each set of waki-biki yoroi is carefully handcrafted by our skilled artisans. Please allow at least 5 to 7 days for processing and careful crafting of your custom order.