What is a double edged Japanese sword called?

Answer 1

A double-edged Japanese sword is called a "nodachi" or "tachi," depending on its specific characteristics and historical context. These swords are traditionally longer than the more commonly known katana and are designed for use in battle. While the katana typically features a single edge, the nodachi and tachi can be crafted with double edges, allowing for versatile combat techniques. However, it's essential to note that double-edged swords are less common in traditional Japanese swordsmithing, which primarily emphasizes single-edged blades.