Japan's 30‑year bond yields surge to three‑decade high, debt stress intensifies

Japan’s benchmark 10‑year government bond yield rose to around 2.85% in early July, the highest level since 1996, while 30‑year yields breached the 4% mark, a peak not seen in over 30 years. The rise follows the Bank of Japan’s policy shift – ending negative rates, dismantling yield‑curve control and lifting its short‑term rate to 1%, the highest since 1995.

The surge reflects growing fiscal pressure as public debt tops 200% of GDP, prompting concerns that higher borrowing costs will strain both the government’s finances and the wider economy. Weakening yen pressures import prices, feeding inflation and complicating the BOJ’s tightening path.

Market effects include a slowdown of the yen‑carry trade that previously funded crypto and other risk assets, prompting modest pull‑backs in Bitcoin. At the same time, Japanese banks reported their strongest loan‑growth since the COVID‑era, with a 5.7% year‑on‑year increase in May, driven by real‑estate lending and loans to foreign investment funds. The combined fiscal and monetary developments are reshaping Japan’s financial landscape and drawing attention from global investors.