A katana without a guard is often referred to as a "tsuka-maki" or "tsuka-only" katana. The term "tsuka" specifically refers to the handle or hilt of the katana. In this context, it signifies that the katana lacks the guard or handguard component that is typically found between the blade and the handle.

The absence of a guard on a katana can result in a different aesthetic and handling experience. It may provide a more streamlined and minimalist appearance, emphasizing the elegance and simplicity of the blade and handle. Some sword enthusiasts and collectors appreciate the clean and unobstructed design of a guardless katana.

It's important to note that the absence of a guard can affect the handling characteristics and safety considerations of the sword. The guard plays a significant role in protecting the hand of the wielder and preventing accidental slippage onto the blade during combat or training. Without a guard, the user must exercise additional caution and grip the handle securely to ensure safe handling.

The decision to have a guard or not on a katana is a matter of personal preference, aesthetics, and intended use. Some custom-made or artistic katana designs may intentionally omit the guard for specific artistic or thematic reasons. However, most traditional and functional katanas will feature a guard as an integral part of their design.