haori coat with a family crest
A formal haori coat worn by men, typically with a family crest (紋) on the back and sometimes on the chest and sleeves. Often paired with a hakama for ceremonial occasions.
See also: 羽織
At weddings, the groom's father often wears a haori coat with the family crest.
羽織 is a general haori coat, while 紋付羽織 specifically has a family crest and is more formal.
Compound of 紋付 (もんつき, 'with a family crest') and 羽織 (はおり, 'haori coat').