The Nodachi is a traditional Japanese sword known for its long blade. Wearing a Nodachi typically involves carrying it on your back or shoulder. Here's a general guide on how to wear a Nodachi:

1. Preparation: Ensure that you have a sheath or saya (scabbard) specifically designed for a Nodachi. The sheath should be long enough to accommodate the entire length of the blade.
2. Positioning: Stand with your back facing the sword, hold the Nodachi in one hand, and grip the saya with your other hand. Tilt the saya slightly to slide the blade into it.
3. Insertion: Gently insert the blade into the saya, making sure it goes all the way in. Be careful and avoid any sudden or forceful movements to prevent damage to the blade or sheath.
4. Adjustments: Once the blade is fully inserted, adjust the position of the saya on your back or shoulder. Traditionally, the saya is positioned diagonally across the back with the handle pointing upward and the tip of the sheath pointing slightly forward. Find a comfortable position that allows you to move freely while ensuring the sword is secure.
5. Securing: Some sheaths have a cord or strap that can be used to secure the saya and prevent it from sliding off. If your sheath has one, use it to fasten the saya in place. Alternatively, you can use additional cords or straps to secure the sheath to your body or clothing.
6. Testing: After securing the Nodachi, gently move your body and arms to ensure that the sword remains in place. If it feels loose or unstable, adjust the straps or cords until it sits securely on your back or shoulder.

Remember, wearing a Nodachi is a traditional practice and requires careful handling. It's essential to prioritize safety and respect for the weapon at all times. If you're uncertain or inexperienced with handling swords, it's advisable to seek guidance from a knowledgeable instructor or expert.