The article describes the current state of Japan's public debt, which exceeds its GDP by almost 2.5 times; it seeks to identify the main causes for its growth, analyses its structure, reviews the main stages of its formation; assesses the effectiveness of government measures to regulate it and makes a comparative analysis with the national debt of the United States.The distinctive nature of Japan's public debt is that it is based on the relative stability of Japan’s financial system and a high degree of trust in it both domestically and abroad. In particular, the sustainability of the debt is ensured by the fact that 95% of government bonds are owned by residents. Despite the pessimistic mood of the IMF, investors continue to actively acqui...