Japan's economic malaise has lasted decades. The reasons for their stagnation is a combination of factors that are advanced by some of unique cultural characteristics. Many of their cultural and societal components could be the envy of the civilized world. Civility, honor, collaboration and respect are just a few of the cornerstones of Japanese society. However, reliance on bureaucrats and leaders in the government to lead the economic way for the country coupled with a protected home financial system (limited foreign competition) and a cultural politeness limiting pointed questioning of important issues has combined to stunt their economy.
The key lesson for the US to take away is that US governmental insertion into all phases of American life (which is constantly growing and expanding) will continue to cripple true and healthy economic growth. All politicians but especially democrats/liberals need to be put on notice. In addition, protectionism only backfires. Competition drives innovation, competency and capability. If "protectionism" is being used as a negotiating tool to right a specific, egregious trade issue where the US is being treated unfairly then fine. But the overall US stance should always be toward open markets and competition. Lastly, the US educational model needs to be overhauled to ensure all Americans receive the necessary knowledge/experience/insights to be able to adjust to major US and world economic trends.
The changes to many phases of US life(to help) when laid out by politicians and most Haves does not address the solutions and answers to the problems and questions that still confound America.