2025年10月27日，日本股市出現歷史性大漲，日經225指數首次突破5萬點大關，創下自1949年指數創立以來的最高紀錄。當天，日經225指數單日暴漲1212點，收盤漲幅達2.46%，東證指數也上漲 1.7%，呈現全線走強的態勢。市場分析指出，這波股市暴漲既受國際政治動態影響，也與日本國內政策預期密切相關。

消息面上，美國前總統川普將於10月28日訪問日本，並與日本新任首相高市早苗會面。日本媒體報導指出，美日兩國領導人預計將就經濟、貿易、國防與安全保障等廣泛議題進行討論，並強化同盟關係。投資者普遍認為，這種高層外交互動能夠提升市場信心，刺激日股上揚。

另一方面，高市早苗的經濟政策主張也被認為是推動股市上漲的重要因素。她在一定程度上延續了「安倍經濟學」的核心理念：一方面，強調政府對日本央行利率調控政策的適度介入，傾向維持寬鬆的貨幣政策；另一方面，支持擴張性財政政策以刺激經濟成長。這些政策預期提振投資者對日本經濟增長和企業盈利的信心，尤其在金融、製造與科技板塊表現尤為亮眼。

個股方面，軟銀集團與愛德萬測試當天股價大漲超過 6%，日立、迅銷、三菱商事、伊藤忠商事則上漲超過 2%，顯示大型企業普遍受益於市場樂觀情緒與政策預期。

值得注意的是，日本股市的上漲帶動亞洲其他主要股市同步走強。韓國股市方面，韓國綜合指數單日大幅收漲 2.6%，首次突破 4000點，其中現代重工大漲超過 5%，SK海力士上漲超過 4%，三星電子上漲超過 3%，並創下歷史高位。其他亞洲新興市場亦普遍上揚，MSCI亞洲新興市場指數漲 1.64%，顯示本輪股市上漲具有區域性共振效應。

綜合來看，這次日本股市創歷史新高，是政策預期與國際政治因素共同作用的結果。市場對於日本新政府延續寬鬆貨幣與積極財政政策的信心，加上美日高層會晤的利好消息，使得投資者情緒高漲，推動日經指數突破5萬點這一重要心理關口，標誌著日本股市進入新的歷史性階段，也為亞洲整體金融市場帶來強勁上行動力。

On October 27, 2025, the Japanese stock market experienced a historic surge, with the Nikkei 225 index surpassing 50,000 points for the first time since its inception in 1949, marking a record high. On that day, the Nikkei 225 jumped 1,212 points, closing up 2.46%, while the broader TOPIX (Tokyo Stock Price Index) rose 1.7%, reflecting a broad-based rally across the market. Analysts attribute this dramatic increase to a combination of international political developments and domestic policy expectations.

On the political front, former U.S. President Donald Trump was scheduled to visit Japan on October 28 to meet with newly inaugurated Prime Minister Sanae Takaichi. Japanese media reported that the leaders were expected to discuss a wide range of topics, including the economy, trade, defense, and security, reaffirming the strength of the U.S.-Japan alliance. Investors interpreted these high-level diplomatic interactions as a positive signal, boosting market confidence and contributing to the surge in Japanese equities.

Domestically, Prime Minister Takaichi’s economic policy stance was also seen as a key driver of the rally. Her proposals largely continue aspects of the so-called “Abenomics” strategy: she supports government involvement in central bank interest rate policies, favoring continued monetary easing, and advocates for expansionary fiscal measures to stimulate growth. These policy expectations enhanced investor confidence in Japan’s economic outlook and corporate profitability, particularly benefiting financial, manufacturing, and technology sectors.

Among individual stocks, SoftBank Group and Advantest surged over 6%, while Hitachi, Fast Retailing, Mitsubishi Corporation, and Itochu Corporation rose more than 2%, reflecting broad gains among major corporations driven by optimism over policy and market conditions.

The rally in Japan also had a spillover effect across other Asian markets. In South Korea, the KOSPI index rose sharply by 2.6%, breaking the 4,000-point mark for the first time in history. Major Korean stocks saw significant gains, with Hyundai Heavy Industries up over 5%, SK Hynix rising over 4%, and Samsung Electronics climbing more than 3%, reaching record highs. Other Asian emerging markets also performed strongly, with the MSCI Asia Emerging Markets Index up 1.64%, indicating a region-wide positive momentum.

Overall, this historic surge in the Japanese stock market reflects the combined impact of domestic policy expectations and international political developments. Investor confidence in Prime Minister Takaichi’s commitment to monetary easing and proactive fiscal measures, along with the anticipated U.S.-Japan summit, propelled the Nikkei 225 past the psychologically significant 50,000-point threshold. This milestone not only marks a new historical phase for Japan’s equities but also injects robust upward momentum into the broader Asian financial markets.