Samurai swords, particularly the katana, are designed to be balanced. The balance of a sword refers to the distribution of weight along the blade and hilt, allowing for proper handling, maneuverability, and control.

In a well-balanced sword, the center of mass, or the point where the sword naturally rests when balanced on a finger or fulcrum, is typically located slightly closer to the hilt or tsuba (guard) rather than at the tip. This balance point allows for a nimble and responsive weapon that can be wielded effectively.

The balance of a samurai sword is carefully considered during its construction. Traditional Japanese swordsmiths took great care to create swords with a harmonious balance between the blade, hilt, and fittings. The placement of the tang (nakago) within the hilt and the choice of materials for the blade and hilt contribute to achieving the desired balance.

The specific balance of a samurai sword can vary depending on factors such as the style, time period, and intended use of the sword. For example, a sword designed for cutting may have a slightly different balance compared to a sword designed for thrusting or agile techniques. Furthermore, individual preferences of swordsmiths and the specific requirements of a samurai's martial art or combat style may influence the balance of a sword.

A well-balanced samurai sword allows the wielder to perform precise strikes, quick movements, and fluid techniques while maintaining control and stability. Achieving proper balance is an important aspect of crafting a high-quality and functional samurai sword.