亚开行-日本央行20多年非常规货币宽松的历史，特别强调过去10年所追求的框架（英）-2023.5-57页

Summary of Bank of Japan's Unconventional Monetary Easing Policies

This paper analyzes the Bank of Japan's (BOJ) history of unconventional monetary easing over more than two decades, with special emphasis on its frameworks pursued in the last 10 years under Governor Haruhiko Kuroda.

Key Policies Reviewed

1. Zero Interest Rate Policy (ZIRP) (1999): Intended to encourage low borrowing and stimulate spending, but implemented prematurely, leading to a credibility hit when reversed in 2000.
2. Quantitative Easing Policy (QEP) (2001): A significant shift to unconventional policy, involving large-scale purchases of Japanese Government Bonds (JGBs) and other assets to influence market liquidity and push down long-term interest rates.
3. Comprehensive Monetary Easing (CME) (2010): Continued large-scale asset purchases, though with less vigor than the initial QEP.
4. Quantitative and Qualitative Monetary Easing (QQE) (2013 onwards): Announced by Kuroda, replacing the short-term rate target with the monetary base as the primary tool. Included diversification into ETFs and J-REITs, aiming for sustained price stability (2% CPI inflation).
5. Negative Interest Rate Policy (NIRP) (2016): Introduced to stimulate inflation and boost economic activity by discouraging cash holdings and encouraging lending.
6. Yield Curve Control (YCC) (2016): Implemented to maintain low long-term interest rates (targeting ~0%) to achieve the inflation goal, initially combined with NIRP.

Context and Impact

• Historical Background: Unconventional easing emerged partly due to Japan's struggles with low inflation since the asset price bubble burst in the early 1990s, government-driven early tightening, operational reforms, and the Great Moderation trend.
• Global Influence: The BOJ pioneered many unconventional tools that other central banks subsequently adopted, notably after the Global Financial Crisis (GFC).
• Kuroda's Legacy: His tenure marked a period of intense, somewhat unprecedented, policy expansion aimed directly at escaping deflation. QQE was extended with higher purchase targets. NIRP aimed to enhance QQE's impact, while YCC was designed to provide stability.
• Challenges: QQE+NIRP/YCC proved complex and later communication became strained regarding the pace of JGB purchases (sometimes termed "stealth tapering"). Achieving sustainable 2% inflation remains elusive as the BOJ faces enormous balance sheet risks, liquidity constraints in JGB markets, and a stagnated Japanese economy driven by low potential growth and labor market rigidities.
• Recent Developments: The COVID-19 pandemic saw continued expansion and the introduction of innovative loan programs to support private sector lending. FX interventions in 2022 further complicated the picture by weakening the yen despite the BOJ's accommodative stance.
• Evaluation: While BOJ policies under Kuroda were bold and contributed to Japan finally escaping technical deflation, they failed to achieve stable and durable price stability. Future success depends on sustained favorable external conditions, effective fiscal-monetary coordination (Abenomics), and managing the high risks inherent in the massive balance sheet. The BOJ's experience provides a cautionary framework for other central banks navigating unconventional monetary policy.