Recently, Japan’s Finance Minister has repeatedly made strong verbal interventions—often dubbed ‘jawboning’—in an attempt to reassure markets about the stability of Japanese government bonds (JGBs). However, these statements have failed to curb rising JGB yields or alleviate investor concerns over Japan’s fiscal sustainability. The core issue lies in Japan’s long-standing reliance on ultra-loose monetary policy and massive fiscal deficits to prop up its economy, resulting in a public debt-to-GDP ratio exceeding 260%—the highest in the world. Although the Bank of Japan has used Yield Curve Control (YCC) to suppress long-term interest rates, rising domestic inflation and elevated U.S. Treasury yields have intensified carry trades and capital outflows, putting pressure on the JGB market. The minister’s rhetoric lacks credible backing from concrete fiscal consolidation plans or structural reforms, undermining market confidence. Moreover, deep-rooted challenges like rapid population aging and a shrinking labor force further erode Japan’s long-term debt repayment capacity. Consequently, verbal assurances alone cannot resolve the fundamental risks embedded in Japan’s sovereign debt; markets are demanding coordinated, credible fiscal and monetary strategies instead.
近期，日本财政大臣频频发表强硬言论，试图通过口头干预（即“嘴炮”）来稳定市场对日本国债的信心。然而，这种言辞并未能有效遏制日债收益率的上行压力，也未能扭转投资者对日本财政可持续性的担忧。究其原因，关键在于日本政府长期依赖超宽松货币政策和巨额财政赤字支撑经济，导致政府债务占GDP比重已超过260%，为全球最高水平。尽管日本央行通过收益率曲线控制（YCC）政策压低长期利率，但随着通胀抬头和美债收益率高企，套利交易和资本外流加剧，使得日债市场承压。财长的口头承诺缺乏配套的财政整顿计划和结构性改革，难以取信于市场。此外，日本人口老龄化、劳动力萎缩等结构性问题进一步削弱了长期偿债能力。因此，仅靠“嘴炮”无法解决日债的根本风险，市场更期待切实可行的财政与货币政策协调方案。
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