The Nikkei 225 reached a new intra-day high of 63,091 yen [1] on Monday, driven by gains in semiconductor and AI-related stocks [1].

This milestone reflects a growing confidence in Japan's technology sector and its integration into the global AI supply chain. The rally suggests that investors are prioritizing growth in high-tech industries despite broader geopolitical uncertainties.

The index surpassed the previous intra-day record set on May 7, 2026 [2]. Before the current rise, the index had been at a closing level of 62,713 yen [2].

Reports on the exact scale of the session's climb vary between sources. One report indicated a rise of approximately 500 yen [2], while another noted a surge of more than 3,500 yen [3]. This discrepancy highlights the volatility present during the trading session.

Market analysts said the growth was due to two primary factors. The strong performance of AI and semiconductor companies provided a fundamental boost [1]. Simultaneously, market optimism regarding the resolution of hostilities between the U.S. and Iran encouraged further investment [3].

The Tokyo Stock Exchange felt the influence of positive momentum from U.S. equity markets, which helped propel the index to its peak [3].

Future stability remains tied to corporate performance. "Whether the stock price continues to strengthen depends on the future financial results of Japanese companies," a market source said [3].

The Nikkei 225 reached a new intra-day high of 63,091 yen

The achievement of a new record high for the Nikkei 225 underscores the heavy influence of the global AI boom on the Japanese economy. By linking the index's performance to both semiconductor demand and US-Iran diplomatic tensions, the market demonstrates that Japan's financial health is currently tied to a combination of technological leadership and geopolitical stability in the Middle East.