Toto’s shares jumped 18% on Friday, reaching ¥6,425—the highest since 2021 and about $41, well above the Nikkei. The rally followed the firm’s disclosure that its advanced‑ceramics unit will expand semiconductor component output, turning the toilet maker into an AI‑related play. Activist investor Palliser Capital has flagged the division’s growth potential.

Semiconductor sales rose 34% year‑on‑year, pushing the ceramics business to generate more than half of Toto’s operating profit, which climbed 11% to ¥53.8bn for the year to March. The firm pledged a ¥30bn investment to expand mass production and R&D through FY2028, targeting a 27% revenue jump for the unit next year.

Despite supply‑chain strains from Middle‑East energy shocks that forced a temporary halt to prefabricated‑bath orders, Toto expects geopolitical risks to ease after July, having already absorbed a ¥7bn hit. Analysts such as Citi’s Masashi Miki gave the earnings a modest rating, but the market’s rally reflects confidence that the AI‑linked ceramics segment will drive future earnings.

Toto’s pivot mirrors moves by peers such as Kioxia, which recently overtook Sony in market value, and Kao, which launched a chip‑cleaning plant last year. The trend underscores how traditional manufacturers are leveraging AI‑driven demand to diversify revenue streams and capture new growth opportunities worldwide.