The phrase 「とどうふけんくいず」 means [都道府県クイズ](javascript:void(0)). This translates to "Prefectures Quiz" in English. It typically refers to quizzes related to the 47 prefectures of Japan.
- とどうふけん (都道府県) means "prefectures" (the administrative divisions of Japan).
- くいず (クイズ) means "quiz."
So this phrase is about quizzes concerning the Japanese prefectures.
