Nikkei 225 Falls Today, September 14: Japanese Benchmark Drops 1.7% Amid AI Safety Fears And Oil Price Surge, Check Top Falling Stocks And Key Reasons

The Nikkei 225 fell 1.7% on Monday, slipping below 63,000 as concerns over AI safety and higher oil prices weighed on Japanese equities. Technology and AI-linked stocks led the decline, with SoftBank Group and Kioxia Holdings among the biggest losers.

By: Zainab Khanam
Last Updated: September 14, 2026 10:04:00 IST

The Nikkei 225 came under heavy selling pressure on Monday, falling 1.7% to below the 63,000 mark and touching a six-week low. The decline followed weakness in US stock futures as investors grew cautious about the risks surrounding the rapid development of artificial intelligence.

Rising crude oil prices added to the pressure on Japanese equities. Saudi Arabia’s shutdown of the East-West pipeline, an alternative route to the Strait of Hormuz, raised concerns about energy supply and pushed oil prices higher.

Why Are Japanese Stocks Falling Today?

Investor sentiment was hit by growing concerns about the safety of advanced AI systems. Anthropic CEO Dario Amodei recently called for AI companies to slow the development of their most advanced models because of potential safety risks. The comments weighed particularly heavily on technology and AI-related companies, which had contributed significantly to the Japanese market’s gains.

Higher oil prices were another concern for investors. More expensive energy could increase inflationary pressure and strengthen expectations that major central banks will maintain or raise interest rates.

Which Japanese Stocks Fell The Most?

Technology and AI-linked shares were among the biggest decliners on Monday.

  • SoftBank Group: down 12%
  • Kioxia Holdings: down 8.6%
  • Taiyo Yuden: down 8.3%
  • Advantest: down 4.5%
  • Tokyo Electron: down 2.6%

The selling came despite gains in several major companies. Hitachi rose 3.08%, while Sony gained 3.33% and Recruit Holdings climbed 5.58%.

Nikkei 225: Key Market Data

The JP225 was trading around 63,364 points at 9:52, according to the provided market data. The index was down about 1.01% on the day, while its monthly performance stood at -8.51%. Despite the recent decline, the index remained up 41.04% for the year.

The Nikkei 225 is a price-weighted benchmark tracking 225 major Japanese companies listed on the Tokyo Stock Exchange.

What Is The Outlook For Japanese Stocks?

Markets are also watching monetary policy closely. Expectations of higher interest rates from the US Federal Reserve and the Bank of Japan could add further pressure to equities, particularly if elevated energy prices keep inflation concerns alive.

For Japanese investors, the combination of AI-related uncertainty, higher oil costs and monetary-policy expectations could keep market volatility elevated in the near term.

Also Read: Japan Stock Market Today, September 11: Nikkei 225 Plunges Nearly 3% Below 63,500, Topix Falls 1.9% As Oil Prices And Rate Hike Fears Hit Equities; Check Why Japanese Stocks Are Falling

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