Taboo clothing - Imigoromo

…Today, it is used to mean going out clothes, but originally it meant kimono worn on special occasions, and was used to mean ceremonial attire, formal attire, formal attire, formal attire, and formal attire. Festivals, weddings, funerals, and the many public holidays and annual celebrations from birth to coming of age are special days that are different from everyday life, and the kimono worn on those days is called haregi. …

*Some of the terminology explanations that mention "Iki" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…今では外出着の意味に用いるが，本来はハレの日に着る着物で，礼装，式服，正装，盛装，忌衣などの意味に用いる。祭日や冠婚葬祭，誕生から成人式までのたびたびの祝日や年祝の日は，ふだんとは違うハレの日で，その日に着る着物が晴着である。…

※「忌衣」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報