This study investigated the misuse of consideration expressions in emails by Japanese language learners using data from the development of "SAKURADAYORI." The results of the survey categorized five types of misuse: A) errors in honorific language, B) failure to use mitigating expressions, C) inappropriate greetings, D) expressions unsuitable for the context or recipient, and E) behaviors that are inappropriate in Japanese etiquette. While type-A errors may indicate a lack of Japanese proficiency, type-B and type-E errors could be perceived as personal issues. Therefore, providing feedback that explains the correct expressions and the reasons behind the inappropriate ones is crucial.
https://ror.org/03zyp6p76 
