Setto (or Sechito) refers to the sword which was granted by the Emperor to Shogun who was going to the front or Japanese mission to Tang Dynasty China as the sign of commission in ancient times of Japan (from the Nara period to the Heian period).
節刀（せっとう、せちとう）は、日本の古代（奈良時代から平安時代）において、天皇が出征する将軍または遣唐使の大使に持たせた、任命の印としての刀。