Stone Throwing Battle - Ishinage Gassen

... The samurai era's Injida was still practiced in various places in modern times. For example, in Dejima Village, Niiharu County, Ibaraki Prefecture (now Kasumigaura Town), it was called Ishibushi (stone-throwing contest), and it is said that children would get into an argument across the Hishiki River and start throwing stones, with adults and neighbors rushing to support them. It was said that if they were hit by a stone, they could wash it in the river and not get hurt. There were also cases where the iris-beating contest was contested by splitting into two groups, but many places also held horse races and tug-of-war on this day. ...

*Some of the terminology used in reference to "stone-throwing contests" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　武家時代の印地打は，近代になっても各地で行われていた。例えば茨城県新治郡出島村(現，霞ヶ浦町）ではイシブシ(石投げ合戦)といい，菱木川をはさんで子供同士が口げんかから石投げとなり，大人や近隣の人々も応援にかけつけるありさまだったというが，石が当たっても菱木川で洗えば傷にならないといった。菖蒲叩きも二手に分かれて争う場合があったが，この日に競馬や綱引きをする所も多かった。…

※「石投げ合戦」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