Restocking Cycle — Glass Fiber / Power Semi / Passive Components
8 companies
Three key electronics material sectors are entering a destocking → restocking → price increase cycle in 2026. Glass fiber cloth (玻纖布) faces acute shortage with 6-month CCL lead times and 15-30% price hikes — Nitto Boseki holds 90% monopoly in T-glass for AI chip packaging. Power semiconductors (功率半導體) have 20-45 week lead times with SiC critically tight. Passive components (被動元件) see Taiyo Yuden initiating May 2026 MLCC price increases, Murata expected to follow — AI servers use 30,000 MLCCs each (6x normal). This is a structural supply cycle, not speculative.
Recent Updates
Deep DD on Murata: 40% global MLCC share, 30,000 per GB300, orders 2x capacity, 15-35% price hike Apr 1. 10yr tech lead vs China. New AI power module biz targeting JPY 50B. Key risk: China 48% of revenue.
Updated: 6981.T
Q glass competitive analysis: Asahi Kasei is ONE OF SEVERAL suppliers (not monopolist). Glotech (Taiwan) higher purity, Feilihua (China) full chain with Nvidia cert. Downgraded Asahi Kasei to MEDIUM. Real M9 value capture at CCL makers (EMC 2383.TW).
Updated: 3407.T
M9 CCL grade analysis: Nittobo NEZ glass (Df 0.001) CANNOT meet M9 spec (Df ≤0.0007). Asahi Kasei Q Glass (Df 0.0005) wins M9 for Nvidia Rubin. Upgraded Asahi Kasei to HIGH. Added TSMC CoPoS glass panel risk to Nittobo.
Updated: 3110.T, 3407.T
New theme: Destocking→Restocking cycle plays across glass fiber cloth (Nittobo 90% monopoly), power semiconductors (Fuji Electric SiC ramp), passive components (Murata/Taiyo Yuden MLCC price increases). 8 stocks, 3 HIGH conviction.
Updated: 3110.T, 6981.T, 6504.T, 6762.T, 6976.T, 6963.T, 3407.T, 5208.T
Murata cross-update.
Updated: 6981.T
Supply Chain Map
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Peer Comparison
| Company | Ticker | Conv | PE | Fwd PE | P/B | ROE | Op Margin | D/E | Yield | FCF |
|---|---|---|---|---|---|---|---|---|---|---|
| Nitto Boseki | 3110.T | HIGH | 29 | 22 | 5 | 13% | 13% | N/A | 0.5% | N/A |
| Murata Manufacturing | 6981.T | HIGH | ~49.7x TTM (fwd ~37x on FY2026 guidance) | 18.23 | 2.8 | 8.09% | 15.1% | N/A | 1.39% | N/A |
| Fuji Electric | 6504.T | HIGH | 20.6 | 18 | 2.5 | 13% | 11% | N/A | 1.48% | N/A |
| TDK Corporation | 6762.T | MEDIUM | 21 | 12.3 | 2 | 8.32% | 10% | N/A | 1.5% | N/A |
| Taiyo Yuden | 6976.T | MEDIUM | 65 | 28 | 1.5 | 3.92% | 5% | N/A | 2.5% | N/A |
| Rohm | 6963.T | MEDIUM | Loss (FY2025 NI -¥158.4B SiC impairment) | 15 | 2.56 | — | 1% | N/A | 3% | N/A |
| Asahi Kasei | 3407.T | MEDIUM | 13.4 | 12 | 1 | 7.8% | 7% | N/A | 3.5% | N/A |
| Arisawa Manufacturing | 5208.T | MEDIUM | 14.85 | 14.54 | 1 | 6.85% | 7% | N/A | 5.93% | N/A |
Companies
Nitto Boseki
3110.THIGHMaterials
World sole T-glass supplier (90% share) for AI chip packaging substrates — this monopoly is SAFE through 2027+. HOWEVER, their NE/NER glass for PCB mo...
Murata Manufacturing
6981.THIGHPassive Components / MLCC
40% global MLCC share — the toll-gate on AI infrastructure. Every Nvidia GB300 needs 30,000 MLCCs. Full AI cabinet needs 440,000. Orders at 2x capacit...
Fuji Electric
6504.THIGHPower Semiconductors / IGBT
Most focused power semiconductor play among large-cap Japanese industrials. Investing JPY 200B to establish SiC production and expand IGBT capacity th...
TDK Corporation
6762.TMEDIUMPassive Components / Magnets / Sensors
Raised full-year guidance to JPY 2.37T revenue, JPY 245B operating profit, JPY 180B net profit. Forward PE 12.3x is cheap for quality. Diverse passive...
Taiyo Yuden
6976.TMEDIUMPassive Components / MLCC
The catalyst company — initiated May 2026 price increases across MLCCs, inductors, ferrite beads. Mizuho upgraded to Buy. Morningstar raised fair valu...
Rohm
6963.TMEDIUMSiC Power Devices
SiC MOSFET specialist anchoring Japan's power semiconductor consolidation JV (Rohm + Toshiba TDSC + Mitsubishi Electric MoU March 27, 2026). FY2025 (M...
Asahi Kasei
3407.TMEDIUMMaterials
Q Glass (quartz, Df 0.0005) meets M9 CCL spec for Nvidia Rubin — but Asahi Kasei is ONE OF SEVERAL Q glass suppliers, not a monopolist. Competitors: G...
Arisawa Manufacturing
5208.TMEDIUMMaterials
Small-cap pure-play on electronic materials including glass cloth for PCB substrates. PE 14.85x with nearly 6% dividend yield provides downside protec...