NAND flash maker Kioxia has lost two-thirds of its peak market value since June, 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 peak market value since June, 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…