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Japan’s JGB Yields Hit Record Ahead of July 20 Upper-House Vote

The surge threatens to derail the Bank of Japan’s cautious rate-normalization plan

People walk in front of the bank of Japan building in Tokyo, Japan, April 7, 2023. REUTERS/Androniki Christodoulou/File Photo
The Japanese national flag is hoisted at Japan's ruling Liberal Democratic Party headquarters on the official campaign kick-off day for the July 20 upper house election, in Tokyo, Japan July 3, 2025. REUTERS/Issei Kato/File Photo
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Overview

  • Opinion polls show the ruling Liberal Democratic Party may lose its upper-house majority on July 20, empowering smaller parties that favor tax cuts and easier monetary policy.
  • Investors have dumped super-long JGBs in anticipation of larger deficits and political uncertainty, driving yields to record highs.
  • Opposition groups including Sanseito, the Japan Innovation Party and the Democratic Party for the People are pressing the BOJ to slow rate hikes and cut the 10% consumption tax.
  • Heightened political pressure could delay or reverse the BOJ’s gradual exit from near-zero rates, complicating its effort to normalize policy three years after inflation consistently exceeded 2%.
  • With public debt at roughly 250% of GDP, any shift toward additional fiscal stimulus raises concerns about financing costs and market confidence.