Kioxia Holdings Corporation has officially announced the commencement of sample shipments for its tenth-generation BiCS FLASH 3D NAND memory chips to major AI data center operators.

This 1Tb TLC (Triple-Level Cell) flash chip, featuring a 332-layer stacking architecture, is being produced exclusively at Kioxia's Fab2 facility in Kitakami, Iwate Prefecture, Japan, marking a critical strategic push by the former Toshiba Memory unit in the new AI-driven storage "super cycle."

This move comes just one day after Western Digital also announced it was providing samples of the jointly developed BiCS10 to its customers, with the near-synchronous launch from the two NAND giants highlighting the intense industry competition driven by the urgent demand from AI data centers for high-density storage.

Technical Breakthrough: Targeting the AI Compute Bottleneck

The newly launched BiCS10 represents a significant leap in Kioxia's technology roadmap, achieving several key advancements compared to the eighth-generation product.

The stacking layers have increased from 218 to 332, achieving a memory density exceeding 29Gb/mm², a 59% improvement over BiCS8. The I/O interface supports the Toggle DDR6.0 standard, reaching a maximum speed of 4800MT/s, a 33% increase.

Power efficiency has also been substantially enhanced, with output power consumption reduced by 34%, read energy efficiency improved by 30%, input power consumption lowered by 10%, and write energy efficiency boosted by 18%.

The BiCS10 architecture fully retains two core underlying technologies introduced since the eighth generation: CMOS directly Bonded to Array (CBA) and Pitch Splitting (OPS).

The CBA architecture, which involves manufacturing the memory array wafer and the logic CMOS wafer separately before bonding them, overcomes the wiring limitations of traditional monolithic wafers, significantly increasing the potential for higher layer counts.

The continuation of this mature process system means there is no need to build entirely new production line processes, which will notably shorten the ramp-up period for mass production.

Kioxia stated that these new products will primarily be integrated into enterprise and data center solid-state drives (SSDs), designed to meet the growing and urgent demand for high performance, large capacity, and low power consumption in the AI storage sector.

Strategic Production Hub: The Kitakami Fab2 Facility

Behind these sample deliveries is Kioxia's forward-looking investment in production capacity.

The Fab2 wafer fabrication plant in Kitakami, a joint venture advanced flash production line with Western Digital, commenced operations in September 2025.

This facility is Kioxia's sole global manufacturing base capable of stable, large-scale production of 332-layer BiCS FLASH, equipped with a full suite of deposition, etching, and bonding tools adapted for high-layer 3D NAND and possessing mass-production capability for CBA double-wafer bonding.

Originally planned specifically for high-layer-count 3D NAND production, Fab2 is compatible with manufacturing both BiCS9 and BiCS10 products. The factory features an earthquake-resistant structure and state-of-the-art energy-efficient manufacturing equipment, utilizing artificial intelligence to enhance production efficiency.

According to plans approved in 2024, Fab2's capacity will be increased in phases based on market trends.

Kioxia stated that the new facility will help boost capacity to meet the explosive data storage demand from AI service providers, and will simultaneously mass-produce the cost-effective ninth-generation chips alongside the new tenth-generation products.

NAND Super Cycle: AI Inference Reshaping Storage Demand

Kioxia's sample launch coincides with an unprecedented structural transformation in the global NAND storage market.

According to Counterpoint data, global NAND market revenue in Q1 2026 reached $46 billion, a dramatic increase to 3.5 times the level of the same period last year, surpassing the total for the full year 2023.

Samsung leads with a 29% market share, followed by SK Hynix at 18%, with Kioxia in third place at 14%, and Micron, Western Digital, and YMTC each at 13%, all engaged in intense competition for the global third position.

A more fundamental change lies in the reshaping of demand structure. At an investor day in early June, Kioxia forecast that global NAND bit demand would expand at a 22% compound annual growth rate between fiscal 2025 and 2028, while AI inference demand is expected to grow at a much higher CAGR of 46%, accounting for 86% of the incremental demand from data centers.

Servers have gradually overtaken smartphones to become the primary market for storage demand.

In the era of AI inference, the role of flash memory has undergone a fundamental change. Nvidia's Storage-Next architecture positions high-performance NAND flash as a GPU memory extension layer, rather than just a simple data warehouse.

Kioxia has responded with its GP Series SSDs featuring XL-FLASH technology, optimized for high IOPS and low latency under AI GPU workloads, offering near-DRAM performance at the cost of flash memory.

Kioxia plans to increase the revenue contribution from data center and enterprise customers to over 60% by fiscal 2028, reducing its past over-reliance on the consumer market.

Market Value Peak and Stock Volatility: The Glory and Concerns of Japan's Top Stock

The explosion in AI storage demand has propelled Kioxia through a remarkable transformation from a cyclical struggler to Japan's most valuable listed company.

Listed on the Tokyo Stock Exchange in December 2024, the memory chip maker surpassed Toyota Motor in market capitalization on June 12, just 18 months later, reaching a valuation of 44.36 trillion yen.

On June 16, Kioxia's stock closed up over 4% at 97,420 yen, bringing its total market capitalization to 51.75 trillion yen, with a year-to-date gain of 807%.

However, concerns are emerging behind the glory. As Kioxia and its peers continue to expand production, the market worries that the rising price trend for memory chips may be unsustainable.

The memory chip sector has recently shown signs of a pullback, with Micron Technology closing down 3.5% on July 2.

Simultaneously, a major antitrust lawsuit is developing against memory giants, with plaintiffs alleging that Samsung, SK Hynix, and Micron conspired to restrict supply and artificially manipulate prices since 2022, leading to a roughly 700% increase in DRAM prices.

Outlook: Continued Price Surge and Cycle Duration

The future trajectory of memory prices remains the market's core concern. According to the latest forecast, memory prices are projected to surge another 40% to 50% quarter-over-quarter in Q3 2026, followed by a further 30% to 40% increase in Q4, with the uptrend expected to last at least through 2027 and 2028.

Micron's management highlighted a more aggressive contracting model than long-term supply agreements during its latest earnings call, noting the signing of 16 Strategic Customer Agreements (SCAs) that lock in sales for the next 3 to 5 years under "take-or-pay" terms.

Structural constraints on the supply side are supporting price increases. Major memory manufacturers are prioritizing capital expenditure and wafer capacity for high-margin High Bandwidth Memory (HBM), squeezing the supply space for traditional NAND.

Large-scale new capacity additions are not expected to come online until late 2027 or 2028 at the earliest. J.P. Morgan forecasts that the global memory Total Addressable Market (TAM) will surge from $214 billion in 2025 to $1.68 trillion in 2028.

However, some analysts point out that a surge in long-term agreement signings has historically often signaled that a cycle is nearing its peak.

With the BiCS10 sample shipments as a marker, Kioxia is attempting to secure a favorable position in the AI-driven storage super cycle, supported by three key pillars: the dedicated capacity of the Kitakami Fab2 facility, the mature CBA/OPS process system, and its targeted product lineup for AI inference scenarios.

Yet, the industry faces sharp underlying contradictions: the explosive growth of AI demand and structural supply constraints are pushing prices to unprecedented levels, with terminal consumer electronics manufacturers already beginning to cut orders as memory costs exceed 40% of the total phone bill of materials.

Antitrust lawsuits, expansion controversies, and concerns about the cycle peaking are all testing market confidence.

Kioxia's management remains cautious. The company plans capital expenditure averaging about 470 billion yen annually between fiscal 2026 and 2028, a 66% increase from the previous year but still about 10% below historical peaks.

The company aims to lock 50% of its shipment volume through multi-year long-term agreements by fiscal 2028, seeking revenue stability and investment predictability.