On July 21, the Japanese Cabinet decided on the 'Basic Policy on Economic and Fiscal Management and Reform 2026,' also known as the 'Honebuto (Grand Design) Policy 2026,' which elevates the priority of strategic fields such as AI, semiconductors, defense, quantum, energy, and robotics, while shifting the key fiscal target toward achieving a stable decline in the debt-to-GDP ratio.
The Honebuto Policy is an important annual roadmap for the government's economic and fiscal policy, influencing subsequent budget and industrial policy priorities. The fiscal anchor familiar to markets in the past was the primary balance, which indicates whether the government can cover its daily expenditures with tax revenue, excluding interest payments.
This change has stirred the market not because Japan is beginning to emphasize AI, but because the Takachi Cabinet is attempting to shift the fiscal narrative from 'can we balance the books this year' to 'can future growth suppress debt.' If investors believe that investment can yield productivity and tax revenue, it will be perceived as a growth policy; if they do not, it may be priced as fiscal loosening.
The divergence is already evident in government bonds and exchange rates. The Takachi Cabinet advocates using 'responsible active fiscal policy' to support strategic investment, increase the growth rate, and set the stable decline of the debt-to-GDP ratio as a core goal. However, in an article on July 21, economist Takahide Kiuchi of the Nomura Research Institute warned that the initial draft had already triggered volatility in the yen and bond markets, with the yield on 10-year Japanese Government Bonds (JGBs) once reaching 2.9%, and that textual revisions may not be sufficient to restore trust.
Fiscal Anchor Shifts from Annual Balance to Debt Ratio
The official document places the stable decline of the debt-to-GDP ratio at its core, emphasizing multi-year fiscal management, budget formulation reform, and reducing reliance on supplementary budgets.
The debt-to-GDP ratio acts more like a long-term health indicator than a single-year deficit. As long as the nominal economic growth rate exceeds the long-term interest rate, the debt ratio has a chance to stabilize or even decline; if interest rates rise faster, even if the government claims spending is for growth, the debt burden will become heavier.
The new story the Takachi Cabinet is trying to tell is that Japan's long-term low growth, aging population, and labor shortages have constrained potential growth, making it difficult to break the cycle solely by cutting expenditures. Instead of mechanically pursuing a primary balance surplus in a specific year, it would be better to allocate fiscal space to areas that can enhance productivity.
This is precisely bond investors' concern. The primary balance target is simple, observable, and can restrain budget impulses. After this anchor is weakened, the government needs to provide new credible rules; otherwise, 'multi-year management' is easily interpreted as postponing constraints.
370 Trillion Yen is Not a Singular AI Budget
The most easily misinterpreted figure in the market is 370 trillion yen. In public reports, this figure is often summarized as the scale of public-private investment in strategic fields like AI and semiconductors by fiscal 2040. However, the Cabinet Office provided more detailed explanations: the total investment scale for 62 major products and technologies by 2040 exceeds 370 trillion yen, with 'Physical AI + Semiconductors' accounting for approximately 78.5 trillion yen.
This distinction is important. The 370 trillion yen is not a new, one-time budget allocated by the government, nor is it an all-in bet on AI and semiconductors. It is more akin to a long-term industrial investment portfolio covering directions such as AI, semiconductors, defense, quantum, energy transition, and robotics applications.
Japan's AI narrative also differs from that of the United States. The U.S. market focuses more on large language models, cloud capital expenditures, and computing power competition; Japanese policy tends to integrate AI into factories, energy systems, urban infrastructure, and services for an aging society, aiming to address labor shortages, rising maintenance costs, and manufacturing efficiency bottlenecks.
Semiconductors play another role. Japan hopes to regain a part of its industrial position in the global expansion of AI infrastructure by leveraging materials, equipment, advanced manufacturing, and rebuilding domestic supply chains. For public finances, this must ultimately translate into investment, employment, profits, and tax revenue.
This chain is long. The policy framework must translate into projects, projects into production capacity, and capacity into productivity and tax revenue. Any delay in this chain may lead the government bond market to first demand higher interest rate compensation.
The Government Bond Market Trades on Credibility
The Japanese stock market can first trade on policy tailwinds, but the government bond market trades on fiscal credibility. As long as investors suspect fiscal rules have softened, rising long-term yields will, in turn, compress policy space.
This is also the core of the current debate. The government wants to explain expansion with growth, but the market will first look at interest costs. If long-term interest rates continue to rise, Japanese public finances will need to pay more interest, leaving less space for strategic investment. Before growth investments materialize, financing costs have already increased, putting pressure on the policy narrative.
The yen is on the same chain. Declining fiscal credibility may weaken confidence in the exchange rate; if strategic investment raises long-term growth expectations, it may also attract capital back to Japanese assets. For overseas investors, the pricing of Japanese assets no longer depends solely on Bank of Japan policy but also on the credibility of the fiscal anchor.
AI and semiconductor tailwinds cannot be understood in isolation. Related sectors may receive support from policy expectations, but if Japanese Government Bond yields rise too quickly, growth stock valuations and the risk premium for yen-denominated assets will be affected. The market is not trading on 'whether Japan invests in AI' but on whether Japan can prove these investments yield returns.
Nominal Growth Rate Will Determine the Success of the New Framework
This new framework will ultimately face two tests: whether the nominal growth rate can sustainably exceed the long-term interest rate, and whether subsequent budgets can control the pace of government bond issuance.
If future budget cycles show that strategic investment is merely packaging more expenditure as a growth narrative, lacking clear projects, outputs, and fiscal restraint, the concerns of the prudent faction will prevail. Japanese Government Bond yields, the yen, and high-valuation technology sectors may all come under pressure again.
If investments in AI, semiconductors, and infrastructure begin to manifest as corporate capital expenditure, productivity improvements, and tax revenue growth, while the government can still maintain a stable declining path for the debt-to-GDP ratio, the market will gradually price this shift as a growth policy, not fiscal irresponsibility.
The new fiscal anchor Japan has adopted is harder to prove. The primary balance can be calculated from budget tables, but growth outpacing interest rates requires real economic performance. The Takachi Cabinet is betting on strategic investment, and government bond yields will continuously provide the market's score.
