Nanamis cursed technique is called the Ratio Technique, which is unique to him and allows him to deal devastating amounts of damage to powerful curses by striking at weak points on their body. He can visualize parts of his opponents body divided into ten equal parts and create weak spots on the seven-to-three points of each of those body parts. Hitting that weak point causes massive damage. Nanami has honed this technique to a masterful level, being able to defeat curses that are far larger and more physically imposing than himself. He can even use this technique on isolated segments of an opponents body instead of their entire body, and can apply it to inanimate objects. Nanamis tie bears a similar pattern to the visualized graph he uses for his technique, and he often wraps it around his fists to activate the technique.