A NAND maker is now worth more than Toyota

Kioxia (TYO: 285A) briefly passed Toyota (TYO: 7203) on June 12 to become Japan's most valuable listed company, hitting a market value north of ¥44 trillion with the stock up more than 660% this year, eighteen months after a December 2024 IPO that priced at a heavily cut valuation. That is the cleanest marker yet of how thoroughly AI has repriced flash. A spun-out Toshiba memory unit is now carried above the country's largest automaker on one core exposure: NAND and SSDs feeding AI data centers.

What matters going forward is what Kioxia does with the windfall. Management is guiding average annual capex of roughly ¥470 billion from FY2026 to FY2028, about 66% above FY2025, and is openly weighing a third Kitakami fab plus M&A to move beyond pure flash. The advanced-memory work it keeps pointing to, OCTRAM and high-bandwidth flash, says where the gap is. Kioxia does not make DRAM or HBM, and that is the one part of the AI memory stack it cannot currently sell into.

The hedge is cyclicality, and it is real. NAND has burned investors before. But this does not look like a normal late-cycle top: Kioxia says its 2026 output is already sold out, and Goldman's model has the market in deficit through 2028 because no meaningful new capacity lands until late 2027. Analysts remain split anyway, with price targets running from ¥17,000 to ¥80,000 and a forward P/E richer than Samsung (KRX: 005930) or SK Hynix (KRX: 000660).

For anyone buying consumer SSDs, the relevant part is the sold-out line. Kioxia is steering capex and any acquisition toward enterprise and data center demand, not retail. With supply tight into 2028, client NAND pricing has no slack to give, and newer BiCS output is more likely to chase enterprise SSD margins before it relieves cheap client drives.

Drafted with AI assistance against parallel reporting.

Sources:

• DigiTimes, June 15, 2026 (Kioxia surpasses Toyota, eyes M&A push)
• Bloomberg, June 12, 2026 (Kioxia becomes Japan's most valuable firm)
• TrendForce, June 3, 2026 (¥470B annual capex FY26-28, third Kitakami fab and M&A weighed)
• Kioxia Investor Day 2026 (capex plan, OCTRAM/HCF advanced memory, 10th-gen BiCS)
• Goldman Sachs via Borecraft, May 31, 2026 (NAND deficit through 2028)
• TradingKey, June 2026 (660% YTD, valuation divide, ¥17k-¥80k targets, forward P/E vs Samsung/SK Hynix)