The Nikkei stock average rose more than 1,700 yen [1] to enter the 68,000-yen range for the first time [2].

This surge reflects a massive shift in investor confidence toward the artificial intelligence and semiconductor sectors, challenging the long-standing dominance of traditional Japanese industrial giants.

Market activity was characterized by heavy buying pressure on AI and semiconductor-related stocks [2]. This concentrated demand pushed the overall index higher, signaling a broader market rally centered on high-tech infrastructure.

Among the biggest winners was Kiokushia Holdings. The company's market capitalization briefly exceeded 45 trillion yen [2]. During this peak, the semiconductor firm overtook Toyota to become the second-largest company in Japan by market value [2].

The rise of Kiokushia Holdings highlights the volatility and rapid growth associated with the global AI boom. While Toyota has historically anchored the Japanese economy through automotive manufacturing, the sudden ascent of a chipmaker suggests a pivot in where the market sees future value.

Trading in the Tokyo stock market remained focused on these tech-heavy gains throughout the session [2]. The index's move into the 68,000-yen territory marks a significant milestone for Japanese equities, driven by the appetite for hardware essential to AI processing.

The Nikkei stock average rose more than 1,700 yen to enter the 68,000-yen range.

The brief displacement of Toyota by Kiokushia Holdings as Japan's second-largest company underscores a structural transition in the Japanese economy. It signals that the market is increasingly valuing the 'brains' of modern technology—semiconductors and AI capabilities—over the physical manufacturing of vehicles, reflecting a global trend where tech infrastructure becomes the primary driver of national market capitalization.