How a Japanese Toilet Company Cracked the AI Supply Chain

How TOTO’s century of ceramics mastery positioned it inside the AI supply chain, and what its story reveals about the long-term logic of monozukuri.

A ceramic toilet is one of the most geometrically complex objects mass-produced anywhere.

Cast as a single piece from liquid clay, it must shrink by roughly 10% during firing without cracking, warping, or trapping air. Achieving that reliably, millions of times a year, requires the kind of deep process knowledge that the Japanese manufacturing tradition calls monozukuri: mastery accumulated through decades of disciplined refinement, where understanding of materials compounds slowly and pays off in ways that are difficult to predict in advance.

TOTO, the Kitakyushu-based company behind the Washlet bidet seat, has been refining this process since 1917. The same capabilities that produce defect-free bathroom ceramics (casting uniform bodies, controlling particle contamination, firing at precise tolerances) also turn out to be exactly what semiconductor fabrication requires. Since 1988, TOTO has manufactured electrostatic chucks: high-purity alumina discs that hold silicon wafers steady during the plasma etching of memory chips.

For most of those years, few people outside the chip industry knew or cared. The AI boom changed that. As demand for memory chips surged, chipmakers expanded capacity and ordered more etching equipment from Lam Research, a long-standing TOTO partner. In January 2026, Goldman Sachs upgraded TOTO’s stock to Buy. The shares climbed roughly 60% in a year; London-based activist fund Palliser Capital took a stake, calling TOTO “the most undervalued and overlooked AI memory beneficiary.”

Here is how TOTO built an unlikely windfall from the AI boom by focusing on what it does best.

The ceramics lineage

TOTO’s institutional comfort with long-horizon materials R&D is inherited. The company descends from the Morimura Group, a constellation of ceramics firms dating to 1876 that also produced Noritake, NGK Insulators, and Niterra. What links these companies is a shared conviction, rooted in more than a century of experience, that ceramic process knowledge developed for one application can eventually prove valuable in entirely different ones.

TOTO’s founder, Kazuchika Okura, embodied this philosophy before anyone had a name for it. After visiting Europe in 1912, he funded a ceramics research lab out of his own pocket, running over 17,000 experimental iterations of clay and glaze before producing Japan’s first seated flush toilet in 1914. When the parent company’s board refused to fund the import of an advanced German tunnel kiln, Okura bought the patent rights himself.

His founding credo, written in a letter to his successor, set the terms: “Kindness must always come first. Your goal should be to provide good products and satisfy the customer. Accomplish that, and profit and prosperity will follow.”

That principle, prioritizing mastery of product and process over short-term returns, has governed TOTO’s strategic choices ever since. It is also the principle that kept a loss-making ceramics unit alive for three decades.

Three decades of loss-making

TOTO began R&D in fine ceramics in the late 1970s. A dedicated division followed in 1984, and electrostatic chuck production started in 1988. Through the 1990s and 2010s, the ceramics unit tried and failed with several product lines that lost out to domestic and foreign competitors. For roughly 30 years, the division operated at a loss (internally, it was even known as a ‘healthy loss-making business’).

Japanese reporting has described the unit as one TOTO kept alive because it was technically sound and strategically coherent, even when the financials said otherwise. In the language of Japanese corporate strategy, this is tane-maki (seed-planting): investing in exploratory work with uncertain payoffs and trusting that some efforts will find their moment.

That moment arrived around 2016, when TOTO cut the losing product lines and focused on electrostatic chucks. In 2020, an ¥11.8 billion factory opened at its Nakatsu site in Oita Prefecture. A smart-factory system cut lead times by two-thirds and raised output per worker by half. The chucks wear out under plasma exposure and need replacing roughly once a year, giving the segment a recurring-revenue profile unusual in ceramics manufacturing. TOTO received recognition under Lam Research’s Supplier Excellence Awards in both 2023 and 2024.

By fiscal 2025, the ceramics segment posted ¥50.3 billion in revenue (up 38%) and ¥20.4 billion in operating profit (up 86%), at a margin of roughly 40%, against a group average of about 7%. For fiscal 2026, ceramics operating profit is guided to surpass TOTO’s Japan housing-equipment division for the first time, on just 7% of consolidated revenue. Meanwhile, the core fixtures business is restructuring through plant closures in China and a ¥34.1 billion write-down.

A broader pattern in Japanese industry

TOTO is the most vivid example, but the pattern repeats across Japanese manufacturing. Several companies whose origins lie in everyday consumer goods have found that accumulated materials expertise translates directly into AI infrastructure.

Ajinomoto, the seasoning company, makes insulating film for processor substrates using resin chemistry derived from its umami research, and holds an estimated 95% or more of the global market for this component. Kao, the soap and cosmetics maker, supplies semiconductor cleaning chemicals developed from its surfactant know-how. Ibiden is a primary supplier of substrates for Nvidia’s most advanced chips. Daikin is applying fluorochemistry from its air-conditioning business to data center cooling.

None of these companies planned to serve AI. What they share is the monozukuri disposition described above: a commitment to refining process knowledge over decades, even when the eventual commercial application is nowhere in sight. In a global business environment that increasingly rewards speed to market and rapid pivots, this orientation can look like inertia. The TOTO case suggests it can also function as a form of strategic optionality, quietly building capabilities that become valuable when market conditions shift.

The management question

Nobody at TOTO in the 1970s anticipated large language models. The ceramics unit survived because the company’s institutional culture tolerated strategic ambiguity: long leadership tenures, a founding philosophy that placed product quality above returns, and a governance structure willing to give a promising team decades to find its footing. This is consistent with what Professor Ulrike Schaede at UC San Diego has described as the Japanese corporate approach of “winning through technology, not scale,” building power in hard‑to‑copy upstream niches instead of chasing scale.

Also read: Rethinking Japan’s Lost Decades with Ulrike Schaede

Seen through that lens, TOTO’s AI windfall is less an accident than the delayed dividend of monozukuri: decades of disciplined, often invisible refinement of materials and processes that only later reveal their value when technology waves shift. In a business climate that prizes speed and visible optionality, TOTO’s ceramics story is a reminder that the most durable options are sometimes the ones fired slowly, layered into the organization’s craft long before anyone knows which market will need it.

For leaders and organizations considering how to balance short-term efficiency with long-term capability building, TOTO’s story poses an interesting question: what capabilities might be sitting inside your own company’s underperforming divisions, waiting for a market that hasn’t arrived yet?