Samurai traditionally wore their katana in a specific manner, adhering to a set of rules and etiquette. Here is a general overview of how samurai wore their katana:

1. Positioning: The katana was worn on the left side, with the edge of the blade facing upward. This allowed for a smoother and quicker draw from the saya (scabbard).
2. Obi (Belt): The samurai would tie the obi (belt) around their waist. The obi was typically made of silk and served as a support for the katana. The obi would be tied tightly, ensuring that the katana was secure and didn't shift during movement.
3. Sageo (Cord): A sageo, a long cord made of silk or cotton, was attached to the kurikata (knob or cord holder) on the saya. The sageo was wrapped around the obi and tied in a specific manner, providing additional security and stability for the katana.
4. Tsuba (Guard): The tsuba, a handguard, was positioned between the tsuka (handle) and the blade. The tsuba served to protect the samurai's hand and provided stability during combat.
5. Kashira (Pommel): The kashira, the end cap of the handle, would be positioned at the end of the tsuka.
6. Saya (Scabbard): The katana would be sheathed in the saya when not in use. The saya was typically made of wood or lacquered wood, and it provided protection for the blade.
7. Etiquette: Samurai observed strict etiquette when handling and drawing the katana. Drawing the sword was done deliberately and with purpose, as unsheathing the katana was often a significant and solemn act.

It is worth noting that specific details of how the katana was worn could vary based on the samurai's rank, situation, and the period in which they lived. The details of how samurai wore their katana evolved over time as fashion, practicality, and social norms changed.