According to a report by NTV
The phone call is scheduled for night time in Japan, no specific time is reported so far. Trump stated earlier this week that a second meeting with Kim Jong-Un is "most likely" to happen and he'll be less enthused by news that North Korea appears to be doing very little - if not, nothing - to stop their nuclear activities. On the latter, are we really that surprised? Not.
I'm guessing Abe and Trump will probably need to catch up on hairstyle tips too.