New answers tagged honorifics
Don't use さん in a formal email. I think "事務局の加島" means she is probably a clerical staff rather than a teacher. (Of course it's a good idea to check it using Google search) So the safe choice would be to address her as 加島様.
Off the top of my head.... In scholarly and/or technical writing regarding bathing or baths. In advertisement for apartments, describing whether they are equipped with bath tubs or not. In the news about a bathroom. Regardless of the context, many male speakers choose to use 「風呂」 over 「お風呂」 on a daily basis.
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