Nikkei 225 Falls 3% as Japan Bond Yields Surge and SoftBank Slides

Key Takeaways

• The Nikkei 225 fell approximately 3% to 64,278.95 during trading on Wednesday, September 2, as rising bond yields pressured Japanese equities.
• Japan’s 10-year government bond yield reached around 3.02%, its highest level since 1996, while SoftBank Group declined about 6.3%.
• Oil prices above $90 per barrel, USD/JPY above 160 and the September 17–18 Bank of Japan meeting remain important near-term market catalysts.

Nikkei 225 Falls as Bond Yields Reach 30-Year High

source: tradingeconomics

The Nikkei 225 extended its decline on Wednesday, September 2, falling approximately 3% to 64,278.95 during Asian trading. SoftBank Group and other technology-related companies led the retreat as investors responded to rising borrowing costs and renewed geopolitical uncertainty.

The decline left the index approximately 11.2% below its June record high of 72,366.34. That peak followed a rapid advance driven by enthusiasm surrounding artificial intelligence and semiconductor demand. The reversal indicates that higher interest rates and energy costs are now challenging some of the factors that supported the earlier rally.

The immediate pressure came from Japan’s government bond market. The benchmark 10-year Japanese government bond yield climbed to approximately 3.02%, its highest level since 1996, after trading near 2.94% at the beginning of the week. September 2 market data also showed rising yields across the United States and several other major economies.

Bond yields move inversely to bond prices. When yields rise sharply, equities can become less attractive relative to fixed-income assets. Higher discount rates also reduce the present value assigned to companies whose expected profits are concentrated further in the future, leaving technology and other growth-oriented sectors particularly exposed.

SoftBank Leads Technology Stocks Lower

SoftBank Group shares fell about 6.3%, substantially underperforming the broader Japanese market. The company’s extensive exposure to technology, artificial intelligence and private-market investments has made its shares sensitive to changes in global risk appetite.

Higher government bond yields can place additional pressure on companies with growth-focused portfolios because investors apply a higher discount rate to expected future returns. Increased market volatility may also reduce valuations across private technology assets, creating another potential source of uncertainty for investment groups such as SoftBank.

Semiconductor-related shares also weakened. Tokyo Electron, Advantest and Kioxia came under selling pressure as the broader retreat in global technology stocks spread into the Japanese session.

The reversal contrasts with the environment in June, when AI and semiconductor enthusiasm helped the Nikkei 225 achieve its first monthly close above 70,000. The index reached an official intraday high of 72,366.34 on June 25 before profit-taking emerged later in the month. Official Nikkei index data showed that June’s trading range exceeded 8,300 points, highlighting the elevated volatility already present in the market.

Oil Prices and Yen Weakness Add Inflation Risk

Renewed military exchanges between the United States and Iran added another layer of pressure. Brent crude traded at approximately $95.56 per barrel, while US benchmark crude reached around $90.88.

Higher oil prices are particularly important for Japan because the country is a major net importer of energy. Rising dollar-denominated crude costs can weaken Japan’s terms of trade, increase production expenses and place pressure on household purchasing power.

The yen’s decline increases that risk. USD/JPY traded near 160.27 during Wednesday’s session, meaning Japanese importers faced the combined impact of higher global oil prices and a weaker domestic currency.

For equities, the effects are mixed. A weaker yen can support the translated earnings of Japanese exporters, including automakers and industrial companies. However, the benefit may be outweighed when currency depreciation is accompanied by rising bond yields, higher energy costs and concerns about tighter monetary policy.

Bank of Japan policy board member Hajime Takata warned that the combination of yen depreciation and the Middle East situation could increase inflation expectations. He also noted that Japan’s producer price index rose 7.2% year on year in July, suggesting that upstream cost pressures could spread further into consumer prices during the second half of fiscal 2026.

BoJ Rate Expectations Move Into Focus

The rise in Japanese bond yields reflects growing expectations that monetary policy may remain restrictive or tighten further.

The Bank of Japan raised its policy rate to around 1.0% at its June meeting. Takata subsequently proposed an increase to 1.25% at the July meeting and argued that future rate increases may need to be conducted flexibly rather than at a fixed pace.

His view does not guarantee that the full policy board will raise rates in September. However, it reinforces the market’s focus on inflation, wage growth, producer prices and yen weakness ahead of the next decision.

The Bank of Japan’s next monetary policy meeting is scheduled for September 17–18. Official BoJ meeting schedule Any indication that policymakers are becoming more concerned about second-round inflation effects could keep upward pressure on bond yields.

Conversely, signs that higher oil prices are weakening domestic demand could complicate the case for an immediate increase. This creates a difficult policy balance between controlling inflation and avoiding excessive pressure on economic growth.

What Could Move the Nikkei 225 Next?

Bond yields are likely to remain the most important domestic indicator. A sustained 10-year yield above 3% could continue to pressure technology shares and other companies with high growth valuations.

Oil prices and developments around the Strait of Hormuz represent another significant risk. Further supply disruption could increase Japan’s import costs and strengthen expectations that inflation will remain elevated.

Traders will also monitor USD/JPY near 160, the performance of global semiconductor stocks and the Bank of Japan’s September meeting.

The near-term Nikkei 225 outlook therefore remains fragile. Continued increases in bond yields and oil prices could expose the 64,000 support level, while easing geopolitical tensions or a pullback in yields could allow the index to stabilise after its sharp decline.