[Kioxia Hits Another All-Time High, Becomes Japan's Most Valuable Company, Up 820% Year-to-Date] According to Golden Finance, on June 17, Japanese storage giant Kioxia closed up 1.35% today at 96,000 yen, marking another all-time high. Its market capitalization reached 52.45 trillion yen, solidifying its position as Japan's most valuable company. Kioxia has surged 820% year-to-date.