Nodachi, which are large, two-handed Japanese swords, were typically carried by samurai or warriors in a similar manner to other long swords of the period. The most common method of carrying a nodachi was to wear it on the back.

To carry a nodachi on the back, a special mounting system called a "saya" was used. The saya is a scabbard specifically designed to accommodate the length of the nodachi. The scabbard would be made longer and wider than those used for shorter swords like the katana or wakizashi.

The saya would typically have a strap or cords attached to it, allowing the warrior to sling the nodachi over their back diagonally. The cords would be secured around the body, often crossing over the chest, to keep the nodachi in place and prevent it from swinging or shifting during movement.

This method of carrying the nodachi on the back allowed the warrior to have both hands free and kept the sword readily accessible for drawing when needed. It also facilitated ease of movement, as the long sword was not obstructing the legs or hindering mobility.

It's important to note that the specific mounting and carrying methods could vary depending on the era, region, or individual preferences. Different schools or styles of swordsmanship might have slight variations in the way a nodachi was carried, but the back-carrying method was commonly used for its practicality and convenience.