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Japan Intervenes to Prop Up Yen, Signals Readiness to Act Again Over Golden Week

Thin holiday trading leaves the currency vulnerable to fresh swings.

U.S. dollar, Euro, Yen and Pound banknotes are seen in this illustration taken May 4, 2025. REUTERS/Dado Ruvic/Illustration
Banknotes of Japanese yen are seen in this illustration picture taken September 23, 2022. REUTERS/Florence Lo/Illustration
The Japanese national flag waves at the Bank of Japan building in Tokyo, Japan March 18, 2024. REUTERS/Kim Kyung-Hoon
The Bank of Japan's (BOJ) new board member Toichiro Asada leaves from his inaugural press conference at BOJ headquarters in Tokyo, Japan, April 1, 2026. REUTERS/Issei Kato

Overview

  • Japanese authorities intervened Thursday for the first time in nearly two years, knocking dollar/yen down to about 155.5 from above 160 before the pair rebounded toward 157.
  • Top currency diplomat Atsushi Mimura declined to confirm the operation and warned speculators that authorities may step back in during Golden Week’s thin trading.
  • Officials say Tokyo is in close contact with U.S. counterparts on currency markets, a signal that coordination is possible if volatility worsens.
  • Analysts say a cautious Bank of Japan, a wide U.S.–Japan interest-rate gap, and high oil prices keep downward pressure on the yen and raise import costs for Japanese households and firms.
  • Mimura has also left open action in crude oil futures if energy-market swings feed into currency moves, broadening the tools Tokyo could use to defend the yen.