Japan's benchmark 10-year government bond yield briefly reached 3.000% on Tuesday, marking the first time it has crossed this threshold since September 1996. This surge represents a significant increase from the 1.6% yield when Prime Minister Takaichi Sanae took office last October. This upward pressure on yields is attributed to several factors: expectations of further rate hikes by the Bank of Japan (BOJ), growing concerns about monetary tightening in the United States, and market wariness regarding the Takaichi government's expansive fiscal policies.
External factors, such as hawkish remarks from Federal Reserve Chair Kevin Warsh hinting at a September US rate hike, have pushed up long-term US yields, leading to a weaker yen and a stronger dollar. The yen briefly fell to the 160-per-dollar level, intensifying inflation concerns and prompting expectations of an earlier BOJ rate hike, which in turn triggered a bond sell-off. While global inflation from the Middle East plays a role, Japan's yield increases have been steeper than those in the US or major European economies.
Domestically, the Takaichi cabinet's "proactive fiscal" policy is a key driver. The government finalized a growth strategy in July to channel over 370 trillion yen ($2.32 trillion) in investments by 2040 and decided in August to temporarily cut the consumption tax on food to 1% for two years starting April 2027. Budget requests for fiscal year 2027 swelled to around 143 trillion yen, and further defense spending increases are expected. However, rising yields increase the interest burden on government bonds, shrinking the fiscal space for these planned tax cuts and spending increases, leading bond investors to issue a warning signal about the government's expansionary stance.
The breach of the 3% threshold is seen by markets as both a sign of Japan's escape from deflation and a return to financial normalization, but also as a warning against further fiscal expansion. Analysts from Tokyo Tanshi indicate markets have almost fully priced in a 25 basis point hike in the BOJ's policy rate to 1.25% next week, and another hike to 1.5% by January. The Takaichi government's ability to present a credible funding plan for its consumption tax cut and defense buildup before year-end will be crucial in determining future yield directions. This shift is also drawing Japanese capital back home, with investors reducing overseas debt holdings, signaling a potential reversal of long-standing global capital flows.
