Iron juice celebration - Kanetsukeiwai

…However, as the names such as 13th Iron-jang, 17th Iron-jang, and 18th Iron-jang indicate, some were linked to the coming-of-age ceremony. In some regions, the coming-of-age ceremony was called the “Iron-jang-jang celebration,” and relatives and young people from the village were invited to the celebration. After that, they were allowed to socialize with young people. …

*Some of the terminology that refers to "Ishii" (the celebration of the iron paste being poured over the flowers) is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…しかし十三鉄漿，十七鉄漿付け，十八鉄漿といった名称が示すように，成女式と結びついたものもあった。成女式を〈鉄漿付け祝〉と呼ぶ地方もあり，祝宴には親類をはじめ村の若者も招待された。その後，若者との交際が認められたのである。…

※「鉄漿付け祝」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