noun
hakama-fitting ceremony
Historical ceremony in which a child is fitted with a hakama for the first time, often associated with court or samurai traditions. The reading ちゃっこ is a specific term; compare 袴着 (はかまぎ).
着袴の儀は、平安時代の宮中行事の一つだった。
The hakama-fitting ceremony was one of the court rituals of the Heian period.