Upline
The rope that connects a harness on the tied person to an overhead hardpoint, carrying load in a partial or full suspension; Japanese tsurinawa.
An upline is the line that runs from a harness up to a hardpoint. Shibari Study defines it this way and cross-refers it to the Japanese tsuri nawa; Anatomie Studio, which also calls it a suspension line or mainline, describes it as the rope between the tied person and the suspension point. Uplines are used in partial as well as full suspensions, and a single suspension often has several. Anatomie Studio stresses that an upline has to be locked off so it is held securely at the suspension point, and Shay Tiziano of Twisted Windows notes that a ring or rigging plate helps keep several uplines apart so they do not crowd together and jam.