As China braces for the full impact of U.S. President Donald Trump's trade war, it's seeking to learn from Japan's economic battles with Washington during the Reagan years.

Chinese officials, businesspeople and academics have been pressing their Japanese counterparts to share experiences from the 1980s, when Tokyo found itself in Washington's crosshairs as its huge trade surplus and increasing industrial might sparked alarm in America.

While there are differences between Japan's ascent as a commercial power a generation ago and China's emergence today as a potential superpower, Japan also has lessons for its neighbor in dealing with rising debt, asset-price bubbles and an aging population.