Two Japanese firms just shut down their production line, cutting 25% of the world’s tungsten hexafluoride (WF₆) capacity. This is what Chinese critical minerals dominance looks like in action — slowly choking allies’ high-tech economies
Kanto Denka Kogyo (sometimes referenced with Showa Denko ties) and Central Glass have notified big chipmakers like Samsung, SK Hynix, and TSMC: inventories run out in June, lines shut for good from July 1. Boom — 2,200 tons of annual global WF₆ capacity gone. This specialized gas is essential for depositing ultra-thin tungsten layers in advanced semiconductors (3D NAND, DRAM, logic chips). Without it, fabs slow or stop
Why? China controls ~80% of global tungsten supply and refining. Beijing tightened export controls and licensing on strategic minerals (tungsten included) — hitting Japan hard. Shipments to Japan have plunged, raw material costs spiked, and these specialty gas producers can’t keep operating profitably or at all. Japanese firms were high-quality, reliable suppliers that Korea and others depended on for ~80% of their WF₆ in some cases
This isn’t random. Japanese PM Takaichi hostile posturing against China and plan to remilitarize Japan brought about Chinese sanction of dual use critical minerals (tungsten, rare earths, etc.) to Japanese companies. Higher costs, supply chaos, lost competitiveness, and eventual factory pain ripple through the semiconductor chain. Auto, electronics, defense… all feel it downstream.
Japan’s been diversifying and stockpiling, but decades of over-reliance on Chinese inputs make this a slow bleed. Allies need to accelerate onshoring, friend-shoring, and alternative processing FAST. Relying on an adversary for the guts of your chip industry isn’t strategy — it’s vulnerability
The “just-in-time” global supply chain was efficient until it wasn’t. Now it’s a national security risk. Wake-up call for anyone still sleeping on critical minerals
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