[Summary]
As of June 2026, semiconductor demand remains strong around AI servers, HBM, and advanced packaging. At the same time, smartphones, PCs, automotive chips, and general-purpose memory are recovering at different speeds. This is not a market where every stock with a semiconductor label should automatically be treated the same.
This Part 1 article organizes 20 Japanese semiconductor-related stocks across three axes: growth potential, stability, and AI exposure. The ranking is not a buy or sell recommendation. It is a framework for comparing stocks.
Part 2 covers process-by-process rankings, key risks, 2026-2030 themes, individual stock profiles, FAQ, and update history.
Related Articles To Read First
This is Part 1. Reading it together with Part 2 connects each stock's positioning with its risks.
| Article | What it covers |
|---|---|
| This article | Latest market conditions, ranking, value chain, theme priorities, 20-stock score table |
| 2026 Update: Complete Guide to Japanese Semiconductor Stock Investing (Part 2): Process Rankings, 20 Promising Stocks Database, and How to Choose by Investment Style | Process top 3 rankings, five major risks, 2030 themes, 20 individual stock profiles, FAQ, update history |
| Why Japanese semiconductor stocks were strong in May 2026 | Rotation inside semiconductor stocks, Tokyo Electron, Kioxia, and the shift in market leadership |
| The world's top 10 semiconductor companies explained | NVIDIA, Samsung, SK Hynix, Intel, TSMC, and the HBM war |
1. Monthly Update: Semiconductor Market Conditions As Of June 2026
As of June 2026, the center of the semiconductor market is AI infrastructure.
The Semiconductor Industry Association reported that global semiconductor sales reached $298.5 billion in the first quarter of 2026, up 25% from the fourth quarter of 2025. SIA also indicated that global semiconductor sales in 2026 are moving toward the $1 trillion level.
Gartner has issued an even stronger outlook. It forecasts worldwide semiconductor revenue of $1.3202 trillion in 2026, with AI semiconductors accounting for about 30% of the total. The key point is that "AI semiconductors" does not mean GPUs alone. It includes HBM, networking, power, data-center memory, and custom ASICs.
Equipment investment is also strong. SEMI's World Fab Forecast 1Q26 Update projects global semiconductor equipment investment of $143.06 billion in 2026 and $159.32 billion in 2027. Logic and memory are the main drivers, and AI demand is embedded in capital spending plans.
However, it would be risky to read this as "buy every semiconductor stock." AI servers, HBM, CoWoS, and advanced packaging are strong. Smartphones, PCs, general-purpose memory, and automotive semiconductors are recovering unevenly. The differences between individual stocks are significant.
The June 2026 view can be summarized as follows.
AI-related demand is strong. Equipment investment is also strong. But the strongest companies are those that control bottlenecks within the supply chain. The market is becoming less willing to reward a stock simply because it is "semiconductor-related."
Stocks To Watch In June 2026
As a monthly update section, the following three stocks are worth checking first as of June 2026. This is not a buy recommendation. It is a watchlist for prioritizing the next earnings, monthly sales, and operating data.
| Stock | Why it matters | What to check |
|---|---|---|
| DISCO (6146) | Close to AI/HBM thinning, cutting, and grinding processes, with high profitability | Monthly sales, shipment sustainability, expectations-led stock pricing |
| Kioxia Holdings (285A) | Exposed to both NAND market recovery and AI storage demand | Memory prices, SSD demand, sustainability of profit after a sharp stock move |
| Organo (6368) | Ultra-pure water is essential for semiconductor fabs; the company sits near the fab investment theme | Order backlog, domestic and overseas fab projects, margin sustainability |
These three companies represent different angles. DISCO is close to the AI/HBM core. Kioxia is tied to the memory cycle. Organo is a fab infrastructure name. Looking across these angles makes it easier to see where the semiconductor rally is broadening.
2. Why Japanese Semiconductor Stocks Matter Now
Many Japanese companies are not primarily high-volume designers and sellers of semiconductors themselves. Their strengths are more often in manufacturing equipment, materials, inspection, back-end processes, substrates, and fab infrastructure.
NVIDIA and TSMC are easier to see as the stars of AI semiconductors. In reality, a large share of the global profit pool is concentrated there. But to mass-produce AI chips, the manufacturing chain cannot avoid the processes that Japanese companies control.
From a Japanese equity perspective, the appeal can be grouped into three points.
| Point to watch | Explanation |
|---|---|
| Process chokepoints | Cutting, grinding, cleaning, deposition, photoresists, substrates, ultra-pure water, and other hard-to-replace steps |
| Domestic policy tailwind | Rapidus, TSMC Kumamoto, JASM, and semiconductor fab investment can revalue the domestic supply chain |
| Entry point for global capital | Tokyo Electron, Advantest, and DISCO are often liquid gateways for overseas investors buying Japan's AI theme |
Regarding TSMC's second Kumamoto fab, Taiwanese authorities reportedly approved the introduction of a 3nm process in March 2026. Mass production is expected to begin in 2028, making this a medium-term catalyst for Japan's semiconductor supply chain.
Of course, policy support alone is not an investment thesis. Even if subsidy or fab construction headlines appear, individual company orders, margins, inventories, customer concentration, and stock-price expectations are separate issues.
3. Scoring Criteria
This article scores the 20 stocks across three axes. The scores are not absolute investment judgments. They are reference points for easier comparison.
| Item | Evaluation criteria |
|---|---|
| Growth potential | Sales and operating profit growth, market expansion potential, linkage to orders and capex cycles |
| Stability | Financial position, operating margin, global share, difficulty of substitution, earnings stability |
| AI exposure | Direct involvement in AI servers, HBM, advanced packaging, data centers, and advanced logic investment |
The investment stance labels are used as follows.
| Label | Meaning |
|---|---|
| Constructive | Business conditions and competitiveness look strong, but valuation and market-cycle risk still need checking |
| Neutral | The business is important, but stock-price expectations, earnings troughs, or cycle uncertainty are meaningful |
| Watchlist | The theme exists, but profit recovery, structural change, or demand improvement still needs confirmation |
4. Conclusion: 20 Japanese Semiconductor Stocks Score Table
| Rank | Code | Stock | Main positioning | Growth | Stability | AI exposure | Overall | Stance |
|---|---|---|---|---|---|---|---|---|
| 1 | 6146 | DISCO | Back-end, cutting and grinding | 9 | 9 | 10 | S | Constructive |
| 2 | 6857 | Advantest | Testers, AI/HBM testing | 10 | 8 | 10 | S | Constructive |
| 3 | 8035 | Tokyo Electron | Broad front-end equipment | 8 | 9 | 9 | A | Constructive |
| 4 | 6315 | TOWA | Molding, advanced packaging | 8 | 7 | 9 | A | Constructive |
| 5 | 4062 | Ibiden | Package substrates | 9 | 7 | 9 | A | Constructive |
| 6 | 285A | Kioxia Holdings | NAND, AI storage | 9 | 5 | 8 | A | Neutral to constructive |
| 7 | 4186 | Tokyo Ohka Kogyo | Photoresists | 8 | 8 | 8 | A | Constructive |
| 8 | 2802 | Ajinomoto | ABF film, electronic materials | 6 | 8 | 8 | B | Neutral to constructive |
| 9 | 4063 | Shin-Etsu Chemical | Silicon wafers, materials | 6 | 9 | 7 | B | Neutral to constructive |
| 10 | 7735 | SCREEN Holdings | Cleaning equipment | 7 | 8 | 8 | B | Neutral |
| 11 | 6920 | Lasertec | EUV mask inspection | 7 | 8 | 8 | B | Neutral |
| 12 | 6323 | Rorze | Wafer transfer systems | 7 | 7 | 7 | B | Neutral |
| 13 | 6525 | KOKUSAI ELECTRIC | Deposition equipment | 7 | 7 | 7 | B | Neutral |
| 14 | 7729 | Tokyo Seimitsu | Measurement and probing | 6 | 7 | 7 | B | Neutral |
| 15 | 5344 | MARUWA | Ceramic electronic components | 7 | 8 | 6 | B | Neutral to constructive |
| 16 | 6368 | Organo | Ultra-pure water, fab infrastructure | 7 | 8 | 6 | B | Neutral to constructive |
| 17 | 3436 | SUMCO | Silicon wafers | 4 | 6 | 5 | C | Watchlist |
| 18 | 6723 | Renesas Electronics | Automotive and industrial semiconductors | 5 | 6 | 4 | C | Watchlist |
| 19 | 6504 | Fuji Electric | Power semiconductors, power control | 5 | 7 | 4 | C | Watchlist |
| 20 | 6963 | Rohm | SiC, power semiconductors | 4 | 6 | 5 | C | Watchlist |
JSR is an important company in photoresists and other semiconductor materials, but after being taken private it is no longer a general listed-stock target for Japanese equity investors. It is therefore excluded from this ranking.
Why The Top Stocks Rank This Way
The table alone does not fully explain the ranking. The following summarizes the main reasons for the top five.
| Rank | Stock | Why it ranks there |
|---|---|---|
| 1 | DISCO | Close to the thinning, cutting, and grinding processes that increase with AI/HBM, while maintaining high profitability. It is treated as a company controlling a back-end bottleneck |
| 2 | Advantest | AI semiconductors and HBM complexity are likely to expand test demand. Earnings momentum is strong, but market expectations are also high |
| 3 | Tokyo Electron | A large core front-end equipment stock and an entry point for overseas capital. China restrictions and cycle risk require more caution than with DISCO or Advantest |
| 4 | TOWA | Strong advanced-packaging theme. Its smaller-cap profile means higher share-price volatility and a greater need to check finances and orders |
| 5 | Ibiden | Strong expectations around high-density substrates for AI servers. Capex burden and customer concentration need monitoring, but the theme is close to the center of AI infrastructure |
5. Five Stocks To Check First
It is not realistic to follow all 20 stocks with the same intensity. If building an initial watchlist, the following five are natural starting points.
DISCO (6146)
DISCO is strong in back-end cutting and grinding. AI chips, HBM, and advanced packaging require more processes for thinning chips and processing them with high precision. For the fiscal year ended March 2026, DISCO reported sales of 436.889 billion yen and operating profit of 184.989 billion yen, with profitability standing out.
However, the stock can easily become expectations-led. A good company and a good entry timing are separate questions.
Advantest (6857)
Advantest is a representative AI semiconductor tester name. For the fiscal year ended March 2026, it reported sales of 1.128610 trillion yen and operating profit of 499.120 billion yen, a sharp increase in both sales and profit. The increasing complexity of AI/HBM raises the value of the test process.
At the same time, the stock is sensitive to NVIDIA-related news, and when expectations are high, the market's required level for earnings also rises.
Tokyo Electron (8035)
Tokyo Electron is a large front-end equipment stock. It is often an entry point when overseas investors buy Japan's semiconductor theme. For the fiscal year ended March 2026, the company reported sales of 2.443533 trillion yen and operating profit of 624.936 billion yen.
Front-end equipment is affected not only by AI but also by logic, memory, China investment, and export controls. It has the stability of a large-cap stock, but geopolitical risk needs to be considered together with the business cycle.
TOWA (6315)
TOWA has strong thematic exposure to advanced packaging, especially resin molding. As HBM and chiplets spread, back-end process precision becomes increasingly important. The stock can be volatile as a smaller-cap name, but it tends to react quickly when the theme strengthens.
Because local earnings notes are still rough for the most recent data, official earnings materials should be checked first during monthly updates.
Shin-Etsu Chemical (4063)
Shin-Etsu Chemical is a large-cap name in silicon wafers and materials. For the fiscal year ended March 2026, it reported sales of 2.573969 trillion yen and operating profit of 635.204 billion yen. Because it also has businesses such as PVC, it is not a pure AI semiconductor stock.
That makes it easier to view as a portfolio foundation. Rather than a short-term surge candidate, it is a stock to evaluate through financial strength, cash generation, and materials share.
6. Semiconductor Value Chain Map
When choosing semiconductor stocks, it is better to look at the process before the company name.
Materials and wafers
Shin-Etsu Chemical, SUMCO, Tokyo Ohka Kogyo, Ajinomoto
↓
Front-end processes
Tokyo Electron, SCREEN, KOKUSAI ELECTRIC, Lasertec
↓
Back-end processes
DISCO, TOWA, Advantest, Tokyo Seimitsu
↓
Advanced packaging and substrates
Ibiden, MARUWA
↓
Fab infrastructure and power
Organo, Fuji Electric
↓
End demand
NVIDIA, AMD, TSMC, cloud providers, AI data centers| Process | Role | Main Japanese companies | How to view it |
|---|---|---|---|
| Wafers | Base material for semiconductors | Shin-Etsu Chemical, SUMCO | Affected by market cycles, but important over the long term |
| Photoresists | Materials for circuit patterning | Tokyo Ohka Kogyo, Shin-Etsu Chemical | Quality requirements rise with advanced processes |
| Front-end equipment | Deposition, etching, cleaning, and related processes | Tokyo Electron, SCREEN, KOKUSAI | Affected by capex cycles and export controls |
| Inspection and test | Defect inspection and testing | Lasertec, Advantest, Tokyo Seimitsu | AI/HBM raises the importance of inspection and test |
| Back-end processes | Cutting, grinding, molding | DISCO, TOWA | Central to advanced packaging |
| Substrates and components | High-density substrates and electronic components | Ibiden, MARUWA, Ajinomoto | Can become bottlenecks around AI servers |
| Fab infrastructure | Ultra-pure water, power, cooling | Organo, Fuji Electric | Beneficiaries outside the core equipment layer |
7. Market Theme Priorities As Of 2026
Most Important: AI GPUs, HBM, And Advanced Packaging
The strongest themes are AI GPUs, HBM, CoWoS, chiplets, and advanced packaging.
Relevant stocks include DISCO, Advantest, TOWA, Ibiden, Tokyo Electron, Ajinomoto, and Tokyo Seimitsu. Stock prices can already reflect high expectations, but the link to earnings is relatively visible.
Important: Memory, NAND, And AI Storage
Memory stocks such as Kioxia need to be viewed through both AI data-center storage demand and the memory market cycle. Upside can be large when conditions improve, but profits can change quickly when prices fall.
Medium-Term: Power Semiconductors, SiC, And Power Efficiency
Rohm, Fuji Electric, and Renesas are stocks to view not only through AI, but also EVs, industrial equipment, power control, and data-center energy efficiency. As of 2026, market enthusiasm is lower than for AI/HBM, but the long-term theme remains.
Recovery Watch: Smartphones, PCs, And General-Purpose Semiconductors
Smartphones, PCs, and automotive demand are not recovering uniformly. On-device AI and AI PCs can become catalysts, but they do not immediately lift profits for every stock.
8. Part 1 Summary
As of June 2026, the most important question for Japanese semiconductor stocks is not simply "how close is this company to AI?" It is "where does this company control a bottleneck in the AI supply chain?"
Core names such as DISCO, Advantest, and Tokyo Electron are watched by overseas investors. Process, component, and infrastructure names such as TOWA, Ibiden, Tokyo Ohka Kogyo, MARUWA, and Organo can be revalued as market understanding of the theme deepens.
However, semiconductor stocks move sharply with the economy, interest rates, foreign exchange, U.S.-China restrictions, capex, and memory prices. Rankings are only an entry point. Part 2 goes deeper into process rankings, risks, 2030 themes, and the 20 individual stock profiles.
Which Type Of Investor Are You?
Before moving to Part 2, it helps to check which investment style is closest to yours. That makes the 20-stock database easier to read.
| Type | Easier candidates to watch | Suitable lens |
|---|---|---|
| Stability-focused | Shin-Etsu Chemical, Ajinomoto, Tokyo Electron | Financial strength, business diversification, long-term continuity |
| AI core-theme focused | DISCO, Advantest, Ibiden | How AI/HBM demand flows into earnings |
| Higher-upside seeker | TOWA, Rorze, MARUWA | Theme sensitivity and smaller-cap volatility |
| Recovery seeker | SCREEN, KOKUSAI ELECTRIC, SUMCO | Earnings troughs, order recovery, and potential revaluation |
Regardless of type, concentrating too much in one stock increases semiconductor-cycle exposure. Part 2 organizes each candidate's strengths and weaknesses through process rankings and individual stock cards.
Next:
Sources
- Semiconductor Industry Association, "Global Semiconductor Sales Increase 25% from Q4 2025 to Q1 2026"
- Semiconductor Industry Association, "Global Annual Semiconductor Sales Increase 25.6% to $791.7 Billion in 2025"
- Gartner, "Gartner Forecasts Worldwide Semiconductor Revenue to Exceed $1.3 Trillion in 2026"
- Gartner, "Gartner Says Worldwide Semiconductor Revenue Grew 21% in 2025"
- SEMI, "World Fab Forecast"
- Focus Taiwan, "Taiwan government approves TSMC's 3nm upgrade for second Japan fab"
- This site's earnings notes for DISCO, Advantest, Tokyo Electron, Shin-Etsu Chemical, Tokyo Ohka Kogyo, Ajinomoto, Ibiden, Kioxia Holdings, MARUWA, Organo, and others
- Checked on: 2026-06-03