They have the 4th largest navy in the world.
They have the most modern of US tech.
They have martial culture and experience.
They can and will fight.
China still fears them, in spite of their BS bluster.
One of Japans biggest strength is that their nation is united in spirit, what counts more than the best hardware money can muster. Something the US is sorely lacking and getting worse every day. No doubt you know the old adage “United we stand, divided we fall” It was the same spirit which helped Israel survive when they were attacked during the six day war. Again from what it looks like, slowly that spirit of unison is slowly disappearing as more and more socialism creeps into the mix. I hope and pray for their sake that they never lose that spirit which helped them to survive.