Capital flows support the long-term rise of Japanese equities

Overview

This report analyzes the Japanese equity market from the perspective of capital flows and investor structure. Its core view is that the long-term rise in Japanese equities is driven not only by foreign investors, but also supported by a shift from savings to investment among individual investors, the return of financial institution capital to Japan, increased equity holdings by insurers and pensions, and ongoing corporate buybacks. The report particularly emphasizes that foreign capital still shows no signs of overheating, individual investors are increasing allocations to Japanese equities through NISA, and domestic institutions are also raising their Japanese equity weightings as the market expands.

Core views

The report argues that the current uptrend in Japanese equities has sustained support from the flow of funds. Foreign investors continued to post large net purchases of Japanese equities in 2026, mainly through cash equities and long-term real money; NISA inflows from individual investors accelerated and the share allocated to Japanese equities increased; among financial institutions, banks have more clearly rotated back into domestic bonds, while insurers and pensions have increased equity allocations; domestic investors hold relatively heavy positions in AI semiconductors and financials.

Analysis framework

The report mainly uses methods such as investor-type breakdowns, fund flow tracking, asset allocation ratios, NISA account inflows, household financial asset structure, overseas securities investment flows, and relative MSCI weighting comparisons to assess the marginal impact of different funding sources on the Japanese equity market.

Methodology notes

• market strategycapital flows and investor structure analysis

  Break down holdings and trading flows by categories such as foreign investors, individual investors, financial institutions, and corporates.

  By observing net purchases, holding ratios, and trading shares across different investor types, the report assesses whether the rise in Japanese equities has sustained funding support.

• allocation analysisrelative MSCI weighting comparison

  Foreign investors remain underweight Japan relative to the MSCI Japan weighting.

  The report estimates that as of the end of May 2026, foreign investors were about 0.67 percentage points underweight Japanese equities relative to MSCI, and returning to a neutral allocation could still require about ¥30-40 trillion of inflows.

• household asset allocationshift from savings to investment

  Changes in NISA and household financial asset structure reflect rising risk-asset allocations by individual investors.

  Individual investors still hold a large amount of cash and deposits, but cumulative NISA purchases and the allocation ratio to Japanese equities have risen rapidly, indicating that the shift from savings to investment is accelerating.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Japanese equity market

  core beneficiary asset

  Strengths

  Multiple types of investors, including foreign investors, individual investors, insurers, and pensions, are all increasing allocations, while corporate buybacks also provide support.

  Weaknesses

  Part of the gains is still influenced by global risk appetite related to AI, and individual investors are also taking profits.

  Comparison

  Compared with U.S. equities, the Japanese market is viewed by the report as having structural themes and serving as a non-U.S. market for diversified allocation.

  Risks

  If foreign capital flows back to the United States, corporate governance reforms slow, or inflation fails to become entrenched, preference for Japanese equities may weaken.

• AI semiconductors

  sector with concentrated capital

  Strengths

  Both foreign and domestic investors are reported to have relatively high exposure to AI semiconductors, benefiting from the global AI growth narrative.

  Weaknesses

  The sector resonates with the U.S. AI market, so its diversification characteristics may be weaker than those of other Japanese structural themes.

  Comparison

  Relative to domestic demand sectors, AI semiconductors are more affected by the global technology cycle and U.S. market sentiment.

  Risks

  AI-driven gains may raise volatility, potentially triggering phased capital outflows or valuation corrections.

• financial stocks

  important beneficiary sector

  Strengths

  Both domestic and foreign investors are focused on the financial sector, and interest-rate normalization may improve expectations for the sector's fundamentals.

  Weaknesses

  Rising long-term interest rates can also bring bond valuation losses, and banks have not significantly increased their equity investment balances.

  Comparison

  Compared with AI semiconductors, financial stocks are more directly affected by domestic Japanese interest rates, returning capital flows, and reflation.

  Risks

  If rising interest rates lead to larger bond losses or economic growth weakens, performance in the financial sector may come under pressure.

• Japanese domestic bonds

  one destination for returning capital

  Strengths

  Banks and deposit-taking institutions reduced foreign securities and increased domestic bond investments in February-March 2026.

  Weaknesses

  Rising long-term interest rates are causing bond losses, limiting some institutions' ability to increase equity investments.

  Comparison

  Relative to foreign bonds, domestic bonds have become more attractive for allocation due to rising yields and changes in attractiveness after currency hedging.

  Risks

  If Japanese interest rates continue to rise, valuation pressure on existing bond holdings may persist.

• U.S. equities and U.S. Treasuries

  source of reallocation and comparison assets

  Strengths

  U.S. AI growth and large IPOs may still attract global capital back, and the existing scale of allocations to U.S. assets remains large.

  Weaknesses

  The volatility risk from AI-led gains is prompting some capital to seek diversification in markets outside the United States.

  Comparison

  The Japanese market is viewed by the report as a candidate diversification market outside the United States, though Asian technology may still resonate with the U.S. AI market.

  Risks

  If the U.S. AI rally accelerates again, some foreign capital may flow back from Japan to U.S. markets.

Key data

• Report date2026-06-09The file date is 20260609.
• Foreign investors' net purchases of cash equities in 2026more than ¥10 trillionAs of the end of May 2026, the intensity is close to that of 2023 and the Abenomics bull market phase.
• Foreign investors' net futures sellingabout ¥5 trillionThe report believes purchases of cash equities better reflect long-term capital preferences.
• Inflows required for foreign investors to reach neutral allocationabout ¥30-40 trillionCorresponding to the roughly 5% neutral MSCI Japan weighting in global portfolios.
• Share of Japanese equities in individual investors' NISA accountsmore than 50%Japanese equity-related allocations in NISA accounts have risen significantly year-to-date in 2026.
• Cumulative NISA purchasesexceeded ¥71 trillion in December 2025, about $445 billionThis exceeded the government's original target of doubling to ¥56 trillion in five years within two years.
• Average monthly NISA inflow in January-March 2026about ¥2.2 trillion, of which 44% was Japanese equitiesHigher than the average monthly levels in 2024 and 2025.
• Household cash and deposits¥1,140 trillionAs of the end of December 2025, the scale was close to the market capitalization of the Tokyo Stock Exchange.
• Potential TOPIX impactIf 10% of household cash deposits flow into Japanese equities, TOPIX could rise by nearly 10%This is a scenario estimate in the report.
• One-year increase in household financial assetsincreased by ¥118 trillionIn the year through the end of December 2025, domestic equities, investment trusts, and overseas securities investments contributed significantly.
• Net purchases of overseas securities by Japanese investors in 2025overseas bonds ¥13.6 trillion, overseas equities ¥1.7 trillionThis turned into net selling in 2026.
• Overseas bond sales in 2026¥3.1 trillion sold in February and ¥4.1 trillion sold in MarchRelated to rising domestic bond yields and the reduced attractiveness of U.S. Treasuries after yen carry adjustments.
• Japan's holdings of U.S. Treasuries$1.19 trillion, about ¥190 trillionAs of March 2026, Japan was the largest holder of U.S. Treasuries outside the United States.

Impact & implications

If the funding trends described in the report continue, the upward momentum in Japanese equities may shift from being driven by a single source of foreign capital to a structural market supported jointly by foreign investors, individuals, and domestic institutions. AI semiconductors and financials may continue to benefit because of concentrated positioning, but they may also be more vulnerable to swings in the global AI theme, interest-rate changes, and profit-taking. NISA inflows from individual investors and the return of capital from financial institutions are key variables in assessing the sustainability of the rally.

Risks

• If the U.S. AI-driven rally continues to strengthen, it may attract some capital back to U.S. markets.
• Individual investors may continue taking profits due to declining real income and prior gains.
• Rising long-term interest rates will cause bond losses for financial institutions, limiting banks' ability to increase equity investment balances.
• NISA fund flows may weaken seasonally in the second half of the year due to annual investment limit constraints.
• If corporate governance reforms slow or inflation fails to become entrenched, foreign investors' long-term preference for Japanese equities may decline.

What to watch

• Whether foreign investors' net purchases of cash equities can continue, and whether net futures selling expands.
• Whether individual investors surpass corporates to become the third-largest holders of Japanese equities in the March 2026 shareholding structure data.
• Whether monthly NISA inflows and the share allocated to Japanese equities remain elevated.
• The direction of reallocation by insurers, pensions, and banks among domestic bonds, foreign securities, and Japanese equities.
• Capital concentration, valuation volatility, and signs of profit-taking in AI semiconductors and financial stocks.
• Japan's corporate governance reforms, inflation trends, and domestic interest-rate movements.