Double Leather Back Scabbard for Prop or Real Katanas and Even - Etsy
Leather Back Scabbard / Baldric for Claymore / Longswords | Outfit4Events
Amazon.com : 2 Pieces Sword Holder for Back Katana Sword Holster Carrying Case Black Sword Carry Bag with Strap Nylon Mini Adjustable Foam Waist Sword Storage Bag for Costume Pirate Cosplay Party
Medieval Sword Scabbard Shoulder Back Sheath Holder Frog for Men Larp Ninja Warrior Costume Leather Buckle Strap Rapier Holster|Costume Accessories| - AliExpress
Back Harness for 2 Katanas - DragonSports.eu
Sword Back Holster - Nylon Bokken Carrying Case - Katana Back Strap