Kioxia has sold out its entire 2026 NAND flash supply, and it just started shipping the chip that data centers actually need.
Kioxia this week began sample shipments of its 10th-generation BiCS FLASH memory, 1Tb TLC dies built for the terabytes an AI training cluster chews through every hour. The timing isn't a coincidence. Kioxia has already sold every gigabyte of NAND and SSD capacity it plans to produce in 2026.
If you've shopped for a solid state drive lately, you've felt this already. A 1TB consumer SSD that cost around $45 last year is now pushing close to $90, and NAND flash prices are projected to jump another 33 to 38 percent quarter over quarter in the first quarter of 2026, according to figures compiled by SoftwareSeni. That's not a blip. That's a chip industry rerouting itself toward one customer: the data center.
The new chip, internally called BiCS10, stacks 332 layers of memory cells, a jump that delivers 59 percent higher storage density and 33 percent faster data transfer than Kioxia's 8th-generation product, Tom's Hardware reported. It runs on the Toggle DDR 6.0 interface at 4.8 gigabits per second and cuts power draw by 10 percent on input and 34 percent on output compared with the older generation. Those aren't marketing numbers. They're the difference between a rack that can keep feeding GPUs and one that can't.
Kioxia is racing into a market Samsung, SK Hynix and Micron would rather not share. Samsung and SK Hynix control the bulk of the world's DRAM output and have redirected much of it toward high-bandwidth memory for AI accelerators. SK Hynix told investors on its October earnings call that its HBM, DRAM and NAND capacity is essentially sold out for 2026. Micron went further and walked away from the consumer memory business entirely to chase enterprise and AI customers instead.
Kioxia's own numbers make the shortage plain. Shunsuke Nakato, the managing director of Kioxia's memory business unit, told the Korean outlet Digital Daily that the company's entire NAND flash and SSD production for 2026 is already committed, and that the tight supply and demand picture will likely run into 2027. Rather than sell to whoever pays the most, Kioxia says it's sticking with existing contracts, an approach closer to a gentleman's agreement than an auction.
Frankly, that restraint tells you something about where Kioxia thinks its leverage is. It doesn't need to chase spot prices when its entire year is already spoken for.
The company's answer to the shortage is to build more of it. Kioxia plans to double its flash production capacity by 2029, expanding output at its Yokkaichi and Kitakami plants in Japan. BiCS10 mass production is penciled in for Kioxia's fiscal 2026 year, which runs from April 2026 through March 2027, at the Kitakami site in Iwate Prefecture. New capacity from Micron and SK Hynix won't reach volume production until 2027 at the earliest, according to reporting from NAND Research, which puts Kioxia's expansion squarely ahead of when rivals can even start closing the gap.
The GPU shortage gets the headlines because Nvidia gets the headlines. But you can't rack a GPU cluster without somewhere to put the data it trains on, and that somewhere is running out. Global NAND supply is expected to grow only about 17 percent this year, well under the 20 to 30 percent that used to be normal. The imbalance driving today's SSD prices isn't closing anytime soon, and Kioxia knows it better than anyone.
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