The Tohoku dialect is not a trope on its own. You may be looking for one of the following:

* AccentAdaptation: Covers cases of translations of Japanese works replacing Tohoku accents with accents with similar stereotypes surrounding them.
* CountryMouse: A character from a peaceful, slow-paced rural location, such as certain parts of Tohoku, finds themself as a FishOutOfWater in TheCity.
* UsefulNotes/JapaneseDialects: Information on dialects of Japanese, including the Tohoku dialect.

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