Despite having one of the largest economies in the world (based on nominal GDP) what problem faces Japan that could affect its economic growth?

Japan faces significant demographic challenges, particularly an aging population and declining birth rates, which contribute to a shrinking workforce. This demographic shift can lead to labor shortages, reduced consumer spending, and increased social welfare costs, ultimately hindering economic growth. Additionally, Japan's high public debt levels and deflationary pressures pose further obstacles to sustainable economic expansion.