tsuna-making ceremony
A sumo ceremony in which the yokozuna's ceremonial rope (tsuna) is made.
See also: 綱 (つな)
The yokozuna's tsuna-making ceremony is a traditional ritual performed before the ring-entering ceremony.
Compound of 綱 (tsuna, 'rope') + 打ち (uchi, 'striking' or 'making') + 式 (shiki, 'ceremony'). The exact historical derivation is uncertain, but the term is specific to sumo tradition.