Investment Thesis
90% monopoly in T-glass cloth for AI chip packaging substrates (ABF/BT). Every Nvidia GB200/GB300/Rubin requires T-glass. FY2025 (Mar 2026): Revenue ¥118.2B (+8.4%), OP ¥20.8B (+26.6%), FY2026 OP guided ¥26.0B (+24.9%), FY2027 OP ¥36.0B (+38%). Order books FULL through end-2026. T-glass price raised +20% Aug 2025; JPMorgan models +25% from 2026 onward. Shipment growth +20-30% YoY — dual price+volume expansion. Fukushima factory (¥15B, ¥2.4B METI subsidy) delivers 3x capacity in Jan-Mar 2027. Nan Ya Plastics partnership (Nov 2025) offloads 20% weaving by 2027, providing near-term supply relief. Next-gen T-glass (CTE -30%) targets 2028 adoption — extends moat runway. 5-for-1 stock split June 29, 2026. JPMorgan and Morgan Stanley both upgraded to Overweight.
Risk
1) Competitor qualification risk 2027+: Apple qualifying Grace Fabric Tech + Taiwan Glass; Chinese quartz cloth reportedly passed Nvidia certification — not yet at scale but structural watch. 2) Capacity hangover 2027-2028: 3x Fukushima + Nan Ya 20% could flip tight supply to oversupply if AI server demand plateaus. 3) Intel glass-core substrate (solid glass, not cloth-reinforced) bypasses T-glass for Xeon 6+ — structural threat beyond 2028 for non-GPU packaging. 4) NI headline -59% in FY2026 (¥41.8B→¥17B) due to absence of one-time asset gains — momentum investors may misread this as deterioration.
Monitoring Trigger
If Fukushima capacity ramp (Jan-Mar 2027) starts on schedule, HOLD. If Apple or second vendor achieves full Nvidia qualification for T-glass alternative, TRIM. If FY2026 OP exceeds ¥26B guidance (upgrade signal), ADD to 8%. If competitor wins ABF substrate customer away from Nittobo, EXIT. Monitor Q1 FY2026 results (Aug 2026) for first signs of ¥26B OP trajectory.
Key Dates
Key Metrics
Supply Chain Evidence
| Evidence | Customer | Product | Detail |
|---|---|---|---|
| confirmed | Nan Ya Plastics (Taiwan) | T-glass cloth weaving — 20% of Nittobo's specialty weaving by 2027; Nittobo supplies NER glass yarn as raw material | Partnership announced Nov 2025. Nan Ya handles 20% of weaving by 2027 as demand relief while Fukushima ramp under construction. Strategic supply chain diversification. |
| confirmed | Nvidia, Google, Amazon (competing for supply) | T-glass cloth for AI chip packaging substrates | Named as direct customers competing for Nittobo T-glass supply per TrendForce Nov 2025 deep-dive. Apple also courting Nittobo while qualifying alternatives. Order books full through end-2026. |
| probable | Ibiden / ABF substrate makers (indirect) | T-glass cloth as spec material in ABF substrate manufacturing | T-glass is an explicit material specification for advanced ABF substrates. Ibiden is world's most advanced ABF substrate maker; uses T-glass-reinforced ABF substrates. No public contract disclosed but technology relationship is structural. |