A fascinating press conference from the standpoint of President Trump and Prime Minister Shinzo Abe’s united position toward the dynamic of North Korea.
It is obvious that Trump and Abe have a strategy for the next step in engagement with Chairman Kim Jong-un.  Notice how PM Abe gives prepared remarks specifically about direct talks, face-to-face talks, with Chairman Kim, facilitated by President Trump opening the door:

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Obviously President Trump trusts Prime Minister Abe as a strategic ally; and a big component of this state visit is the two leaders coordinating regional security issues. China confronted/contained, and simultaneously both partners working on the hostage rescue of Chairman Kim is incredibly consequential.
The strategic value of this state visit is much more than surface appearances.