If it's a democracy and reasonably friendly to the USA, it's not a big deal. In the 1990s everyone thought Japan was going to be the next superpower and that was just fine.
you are not mature enough to discuss such topic if you believe the US will be happy to be taken over by some democratic friends.
My perception is that Japan, after some great success, went through a normal semi-inevitable asset bubble, but their response was uniquely Japanese. Rather than letting firms and the social contract of lifetime employment (particularly for older workers) go bankrupt, their firms and country decided to absorb the losses for a generation and stagnate.
Economically it was a very suboptimal approach but socially/morally I'm less confident it was the wrong call.
https://en.wikipedia.org/wiki/Anti-Japanese_sentiment_in_the...
https://www.nytimes.com/1982/04/06/us/resentment-of-japanese...
No it was not. The US had taken whole bunch of steps to prevent this from happening and those steps were anything but "let's free market decide" and "compete on merits".
It is a real problem for any country or block. As soon as it looks like it threatens leading position of the US all the gloves come of. Obviously not specific to the US. Any other country would do the same given a chance.
Correction: If it accepts the stationing of U.S. troops and succumbs to U.S. financial policies, it's not a big deal
Japan and Germany have paid a huge price to demonstrate their friendship to the U.S. That was not 'just fine'
The situation has waxed and waned but in general West Germany and Japan at the government level have been pretty happy to have US troops stationed there while facing off against the Soviet Union (now Russia) and China. The Ukrainians and the Baltics would love to have some US troops stationed there right now.
The fear of the "Red Sun Rising".
The fear that Japan was going to own most of the valuable real estate in America.
The forcing of Japanese car companies to onshore to protect American jobs.
Blaming of Japanese industrial policy as being unfair competition.
It was the collapse of the Japanese growth engine in the mid 90's that finally ended the American panic.
The U.S. and U.K. are a dual world power.
Whenever powers rise to threaten that duality there is a lot of hand-wringing in Washington.
Wait, how did the UK get in there? Especially in this post-brexit century...