Could be connected to high level law enforcement activity not meant to be made public yet. The only thing with that is Japan seems an unlikely country for somebody who is wanted by the law to escape to. Then again, Japan could have been chosen precisely for that reason - that law enforcement might not pay that much attention to people going there.
It seems three flights were turned around last night. So glad you caught this, there’s some there there, we just have to wait. Eventually John Legend’s GF will talk, hopefully, if she thinks it will damage CINC in her deranged neural knot.