Life is full of lessons, and there are 
two specifically to be learned here:
Trump is an unbalanced, unpredictable malignant narcissist with psychopathic tendencies who ritualistically humiliates both friend and foe.
Sadly,
Prime Minister Takaichi appears to have allowed herself to briefly join in at the expense of a cancer-stricken Joe Biden, outside the West Wing yesterday.
It isn't a wild prediction to say that despite her efforts to suck up and over-modulate her affinity for him, (the Shinzo Abe approach on steroids) indeed a day will come when she herself, or Japan as a whole, likely becomes the target of that same ritual humiliation.
Note the date.
Put it in your notebook.