Jawbreaker

...The most popular examples are "red wrapping paper, yellow wrapping paper," "raw wheat, raw rice, raw egg," "the customer next door is a customer who often eats persimmons," and "frog pyoko pyoko three pyoko pyoko awase pyoko pyoko six pyoko pyoko." It can be seen that many of them take advantage of the difficulty of pronunciation due to the repetition or overlap of m, g, k, and p sounds. They are found not only in Japan but also in other countries, such as the English tongue twister and jawbreaker. Mother Goose has the following spell-like phrase, "Shall she sell seashells on the seashore?", and if you recite it three times, it will stop the hiccups. ...

*Some of the terminology that mentions "jawbreaker" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…〈赤巻紙黄巻紙〉〈生麦生米生卵〉〈隣の客はよく柿食う客〉〈蛙ぴょこぴょこ三ぴょこぴょこあわせてぴょこぴょこ六ぴょこぴょこ〉などが最もポピュラーな例で，m音，g音，k音，p音などの繰返し，ないしはそれらの重複による発音の困難さを利用したものが多いことがわかる。日本に限らず外国にもあり，英語のtongue twister,jawbreakerがそれにあたる。マザーグースには〈Shall she sell seashells on the seashore？〉ほか，3回唱えるとしゃっくりがとまるという次のような呪文めいたものがある。…

※「jawbreaker」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