Labor authorities conducted an on-site inspection Oct. 14 at the Tokyo headquarters of Dentsu Inc..
But, I think that the most sirious problem of this incident is not overwork, it's power harassment...

I read the news that “Pokemon GO” is very popular in America.
Nintendo's stock price went up. 

DPRK informed that DPRK creates own time zone “Pyongyang Time”.
Its clocks backwards 30 minutes.