The Japanese giant behind the memory in your pocket

Countries & Cities · Published 12 October 2026 Swipe more like this →

In short: Every time you save a photo or boot up a device, you likely rely on NAND flash technology. This essential data storage was pioneered by Toshiba engineers in the 1980s, but today, the legacy continues through Kioxia, a major player in the global semiconductor market.

The roots of modern data storage lie in the 1980s, when Toshiba engineers led by Fujio Masuoka developed flash EEPROM. By 1987, they had invented NAND flash memory, a technology that would eventually revolutionize how digital devices store information. While Toshiba commercialized a 4-Mbit NAND device in 1991, the business eventually underwent a massive structural transformation. These early breakthroughs laid the groundwork for the sophisticated storage solutions used in modern electronics today.

Following a period of financial restructuring for Toshiba, the memory business was separated into Toshiba Memory Corporation on April 1, 2017. A consortium led by Bain Capital acquired the business in June 2018 for ¥2 trillion. After several organizational shifts, the company adopted the name Kioxia—a portmanteau of the Japanese 'kioku' (memory) and the Greek 'axia' (value)—in October 2019. The transition was marked by the establishment of Toshiba Memory Holdings Corporation in early 2019. This restructuring allowed the entity to focus specifically on the evolving memory and related-products sector.

Holding a 13.9% market share, Kioxia stood as the third-largest NAND flash provider by revenue during the first quarter of 2026. One of the planet's premier flash-memory manufacturing hubs is the Yokkaichi Plant located in Mie Prefecture. As demand for AI-driven storage grows, Kioxia continues to push the limits of density, developing tenth-generation BiCS FLASH technology with 332 stacked word lines. Beyond its manufacturing prowess, the company is a significant global entity with over 15,000 consolidated employees. Its technological trajectory remains focused on high-density solutions, such as the tenth-generation technology announced for 2025.

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