Honmusubi 本結び
The Japanese name for the square knot, also called the reef knot, listed in kinbaku glossaries among the names for knots.
Honmusubi (本結び) is the ordinary Japanese term for the square knot, also known as the reef knot (Jisho). Jisho glosses its first character, hon, with senses that include main, true and origin, and its second with tie and bind. Andrea Ropes’s kinbaku glossary lists honmusubi as literally the square knot, and its entry for musubime, a knot in general, points readers to it.