Artificial intelligence’s insatiable appetite for data storage has delivered Japanese memory chipmaker Kioxia Holdings Corp. world-beating stock gains this year, a sign that the AI boom is alive and well despite recent market jitters.Kioxia’s shares have risen around 540% year-to-date, outperforming all other members of the MSCI World Index and making it the top stock in Japan’s Topix benchmark for 2025. The NAND flash memory maker, which only debuted on the Tokyo Stock Exchange last December, c...