Kioxia, a Japanese memory chipmaker, becomes Japan’s most valuable company by market capitalization, surpassing Toyota Motor Corp. The shift highlights how the global artificial intelligence boom continues to reshape investment in the country’s technology sector. According to reports, Kioxia’s shares rise on the day in question, gaining 7.6% and pushing its market value above ¥44 trillion (about $274 billion). The company reaches the top spot shortly after beginning trading, with one account noting this occurs roughly 18 months after its stock market debut. The two reports attribute the broader market movement to sustained demand linked to AI-related computing and memory needs, though they focus on different aspects—one on the leadership change in corporate rankings, the other on the trading-day performance and timing since the listing. Taken together, the coverage indicates that investors are valuing Kioxia at a level that now exceeds that of Japan’s long-established automaker, reflecting renewed momentum in memory semiconductors.