PlayStation Japan has posted a new, seven minute trailer for Valkyria Chronicles 4, giving a comprehensive overview of the game. The video touches on just about everything revealed for the game so far, such as the main cast, the imperial cast, gameplay features, and more. The trailer does seem to show quite a bit of the game's story, so despite being in Japanese, you may want to avoid if you want to go into the game fresh when it releases.
Valkyria Chronicles 4 will be released first in Japan for PlayStation 4 on March 21, with a Nintendo Switch version following this Summer. The Western release that includes an Xbox One version will be out later in 2018.