Japan’s government bond market is bracing for increased volatility as stocks soar in response to significant political shifts following the resignation of Prime Minister Shigeru Ishiba, known for his fiscally conservative stance. Ishiba’s departure, triggered by pressures from within his party and a poor electoral showing, raises questions about the future direction of fiscal policy in Japan.
Yields on super-long Japanese government bonds (JGBs) have reached alarmingly high levels, currently hovering near record highs due to both global fiscal concerns and domestic political pressures. The 30-year JGB yield recently soared to 3.285%. Analysts project that Ishiba’s resignation will further compel these yields upward, particularly as Japan grapples with its staggering debt, which stands at nearly 250% of its GDP—the highest among developed nations.
The recent turmoil comes on the heels of the Nikkei share index’s decline from its peak of 43,876.42 recorded in August. As the index closed at 43,018.75 last Friday, speculation about Ishiba’s successor and potential economic policy shifts have gained traction. One noteworthy contender is Sanae Takaichi, who has expressed support for maintaining ultra-low interest rates, which analysts suggest could positively impact the stock market through increased government spending.
Market responses are expected to reflect concerns over potential shifts back to “Abenomics,” the economic approach championed by the late Shinzo Abe, characterized by aggressive fiscal stimulus and monetary easing. Such a pivot could affect currency markets, with experts predicting a weaker yen in the wake of heightened risk perceptions concerning fiscal policy.
Following Ishiba’s electoral defeat earlier this summer, where outsider parties advocating tax cuts and expanded spending gained momentum, the Liberal Democratic Party (LDP) faced intense scrutiny. In light of this situation, Ishiba’s decision to initiate an emergency leadership vote underscores the urgency of addressing both party cohesion and the public’s economic concerns.
The Bank of Japan’s trajectory towards normalizing interest rates may now face disruptions, as attention shifts to upcoming policy meetings in September and October. Analysts express heightened concern that the BOJ may lag behind changing economic conditions, setting the stage for potential adjustments in both JGB yields and broader market sentiments.
In summary, Japan’s financial markets are entering a phase of uncertainty, marked by rising bond yields, fluctuating stock values, and a pivotal political landscape that could shape the nation’s fiscal and monetary policies in the weeks to come.

