The Japanese take their lead from the United States these days (decades ago, it was China they always looked up to).
So if God is angry with the Japanese for their worldliness, etc. He would be angrier at the US for leading many countries into Secularism, apostasy, hedonism, and sin.
However -- one big difference between Japan and the United States:
How many Masses are offered up in each country per day?
We're talking about the Sacrifice of Calvary, where Christ Himself is the Priest and Victim, Who literally asks the Father for mercy.
When you meditate on the Holy Sacrifice, you're not QUITE as shocked that we're all still standing here. The Mass is more powerful than a hydrogen bomb. Not just metaphorically, but really.
Matthew