Japan’s Toilet Maker Toto Quietly Makes AI Chip Component

Investor Palliser Capital calls Toto the most undervalued AI memory beneficiary as its ceramics division quietly powers NAND chip manufacturing.

When investors talk about companies riding the AI wave, names like Nvidia, TSMC, and Samsung dominate the conversation. Nobody talks about toilets. Until now.

Japan’s largest bathroom appliance manufacturer, Toto, globally famous for its heated Washlet bidet seats has been identified by UK-based activist investment fund Palliser Capital as what it calls the most undervalued and overlooked AI memory beneficiary in the market today. The claim, first reported by Bloomberg and the Financial Times on February 17, 2026, has since sent Toto’s stock soaring and sparked a broader conversation about where the real value in the AI boom is hiding.

Most people who know Toto think of it as a toilet company. What almost nobody outside the semiconductor industry knows is that Toto has been manufacturing a critical component used in advanced chip production since the 1980s: electrostatic chucks.

Electrostatic chucks are the devices that hold silicon wafers completely still during the etching process the stage where microscopic patterns are carved onto chips with extraordinary precision. Toto’s chucks are made from advanced ceramics, a material with a unique combination of properties: it remains structurally stable at cryogenic temperatures (extremely low, well below freezing), it minimises contamination risk, and it can be engineered to incredibly tight tolerances. These qualities make Toto’s chucks particularly valuable for cryogenic dielectric etching a manufacturing process that becomes more important as memory chips grow more layered and complex.

Specifically, Toto has become a dominant supplier of electrostatic chucks for equipment made by Lam Research, one of the world’s leading semiconductor equipment manufacturers. The chucks are used in 3D NAND channel hole etching a critical step in manufacturing the NAND flash memory that underpins AI data centres, smartphones, and cloud infrastructure globally.

The explosion in AI infrastructure investment has driven insatiable demand for NAND memory chips. AI data centres require enormous volumes of high-performance storage to train and run large language models. That demand has pushed NAND memory prices sharply higher, lifted chipmakers like Kioxia Holdings to record valuations, and created tight supply throughout the semiconductor supply chain including for the tools and materials used to make those chips.

Toto sits directly in that supply chain. And yet, most investors had no idea. That is precisely Palliser Capital’s argument.

Palliser’s advanced ceramics segment is already contributing 40% of Toto’s operating profit a remarkable figure for a business most analysts had previously treated as a minor side operation. The fund believes the advanced ceramics business has the potential to drive Toto’s revenue growth of 30% or more over the next two years, driven by the memory chip upgrade cycle and sustained demand for replacement equipment.

Palliser Capital confirmed to The Register that it had taken a stake in Toto and is now one of the company’s top 20 shareholders. In a letter sent to Toto’s board, and in a detailed investor presentation, the fund laid out several demands: that Toto improve disclosure and transparency around its advanced ceramics business; that it streamline capital allocation; and that it deploy its approximately ¥76 billion (around $496 million) in net cash more strategically potentially through an expansion of ceramics production capacity ahead of rivals.

Palliser reckons Toto’s valuation gap is largely down to investors not fully appreciating what’s going on behind the bathroom door, putting the disconnect at about ¥554 billion ($3.6 billion), and says fixing disclosure and improving capital efficiency could unlock well over 55 percent upside for shareholders.

The market has taken notice. After news broke that Palliser Capital had taken a stake and was pushing Toto to promote its chip-parts business, the toilet maker’s stock jumped more than 5%. Its shares are up more than 54% over the past year. Toto’s shares have risen nearly 40% in the first two months of 2026 alone.

Goldman Sachs had already been paying attention. The investment bank upgraded Toto’s stock to “buy” last month, explicitly citing strong profit growth potential from the ceramics unit and the assumption of a rebounding NAND market. Four of the nine analysts covering Toto currently advise buying the stock; four advise holding; only one advises selling.

Toto is not alone in this story. Japanese food giant Ajinomoto, better known for its umami seasonings and soup bases, has become an unlikely AI infrastructure play the company produces an insulating material used in advanced semiconductor packaging. In Japan, the AI boom is increasingly reshaping how investors evaluate traditional manufacturers not for what they make for consumers, but for what their materials expertise enables in chip factories.

Toto has been producing electrostatic holders since the 1980s, applying the expertise in ceramics accumulated in the sanitary ware industry. It is only in recent years that this area has become a significant source of revenue, as memory chip complexity has grown. Palliser estimates that Toto has approximately a five-year sustainable competitive advantage before rival materials companies can catch up technologically a meaningful moat in a fast-moving industry.

The broader lesson the story illustrates is becoming one of the defining investment themes of 2026: the AI boom’s value is not confined to chipmakers and software companies. It runs deep into supply chains into materials, equipment, and components made by companies that have never once used the word artificial intelligence in their annual reports.

As Tom’s Hardware put it: Toto’s journey from Washlet ad campaigns to semiconductor materials speaks to the idea that AI is reshaping how investors think about supply chains.