The Japanese yen recorded its strongest one-day gain against the U.S. dollar in nearly two years following suspected intervention by Japanese authorities. The move adds to a long history of currency market interventions — from the Plaza Accord of 1985 to recent efforts to curb excessive yen volatility.

Below is a chronological overview of Japan's major currency interventions from the Plaza Accord era to the most recent yen rally.

July 2026: Yen Jumps After Suspected Coordinated Intervention

The yen surged against the dollar in what market participants widely interpreted as a coordinated intervention by Japanese authorities, marking the currency's sharpest single-day advance in nearly two years.

April–May 2026: Record $72 Billion Currency Support

Japanese authorities deployed approximately $72 billion in currency market intervention during April and May 2026, representing the largest single intervention operation on record.

July 2024: Authorities Return to the Market

Japan re-entered the currency market in July 2024 to support the yen, following a period of sustained yen weakness against the dollar.

April–May 2024: Two Major Intervention Rounds

Japanese authorities conducted two significant rounds of yen-buying intervention in April and May 2024 as the currency depreciated sharply. Ministry of Finance data later confirmed substantial yen purchases during both episodes.

2022: First Major Intervention in Decades

In September and October 2022, Japan intervened to support the yen for the first time since 1998. The intervention came as the yen slid past the psychologically significant 150 level against the dollar, driven by widening interest rate differentials between the Bank of Japan and the U.S. Federal Reserve.

2011: Earthquake and Tsunami Trigger Global Action

Following the devastating earthquake and tsunami in March 2011, the yen surged to a postwar record against the dollar as markets anticipated massive repatriation of funds by Japanese insurers and corporations. The Group of Seven (G7) nations conducted a coordinated intervention — the first such joint action since 2000 — to weaken the currency and stabilize markets.

2003–2004: Frequent Intervention to Manage Yen Strength

Japan conducted record-scale currency interventions during 2003 and early 2004, selling yen aggressively to prevent excessive appreciation that threatened the country's export-driven economy. The combined operations over this period totaled tens of trillions of yen.

Early 2000s: Coordinated International Operations

Japanese authorities continued large-scale intervention into the early 2000s, working at times in coordination with international partners to manage yen strength amid global economic uncertainty. These episodes highlighted how closely Japan's currency policy was tied to broader market conditions well beyond domestic trade flows alone.

Asian Financial Crisis and the 1990s

During the Asian financial crisis of 1997–1998, currency volatility swept across the region. Japan intervened in 1997–1998 to support the yen as the currency weakened amid regional economic turmoil.

Plaza Accord and the Free-Floating Yen

In September 1985, the finance ministers and central bank governors of the G5 nations — the United States, Japan, the United Kingdom, France, and West Germany — met at the Plaza Hotel in New York and agreed to coordinate a depreciation of the U.S. dollar. The accord led to a significant appreciation of the yen and other major currencies against the dollar and is widely regarded as a landmark in the history of international currency cooperation.

Market Significance

Japan's interventions reflect the ongoing tension between domestic monetary policy settings and global currency market pressures. Each episode has been driven by specific economic conditions, including interest rate differentials, financial crises, and natural disasters, underscoring the yen's central role in global foreign exchange markets and why policymakers have often moved when volatility becomes difficult to ignore.

Source: Economic Times Markets