Update (2019-12-26): Nintendo has launched an official Japanese website for the “Fortuna Entertainment” talent, including profiles for the main characters, promotional posters for their work, and preview videos of their performances.
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Nintendo has released two Japanese web commercials for the upcoming Switch port Tokyo Mirage Sessions #FE Encore.
Battle Commercial
World Commercial
Tokyo Mirage Sessions #FE Encore will be released for the Nintendo Switch on January 17, 2020.