The sageo is the decorative cord threaded through the kurigata - a small knob on the saya - and traditionally used to tie the scabbard to a belt or obi. On a Blue Sageo Tanto, this cord is crafted in deep blue, which collectors value not just for its historical reference but for the visual harmony it creates when matched to a blue ito-wrapped tsuka. Unlike the ito, which wraps the handle for grip texture, the sageo serves a purely mounting and aesthetic function on display pieces. Choosing a tanto with a coordinated sageo and ito color is a mark of intentional design rather than a factory shortcut.