kimono and ancient head-dress
Historical term referring to a specific formal court attire from the Heian period, consisting of a kimono-like robe and a tall lacquered cap (冠). Not used for modern clothing.
Heian-period nobles wore the ikan (court robe and cap) during ceremonies.
full traditional Japanese court dress
Compound of 衣 (clothing) and 冠 (crown/cap). The term specifically denotes the combined attire of a robe and a formal cap used in Heian court dress.