NAND flash maker Kioxia has lost two-thirds of its market cap since its June peak, when it became Japan's most valuable listed company, as Chinese rivals emerge (Kyohei Suga/Nikkei Asia)

Kyohei Suga / Nikkei Asia : NAND flash maker Kioxia has lost two-thirds of its market cap since its June peak, when it became Japan's most valuable listed company, as Chinese rivals emerge — TOKYO — Japanese memory chip maker Kioxia Holdings' market value has shrunk to one-third of the peak it reached just four months ago …