Japan stock market falls as semiconductor and AI stocks decline

Nikkei 225 semiconductor stocks Bank of Japan wholesale inflation geopolitical risk

The Nikkei 225 index experienced a significant decline on October 13, 2026, dropping by 1,738.53 yen to close at 67,292.39 yen. The downturn was primarily driven by selling pressure in the AI and semiconductor sectors, following weakness in U.S. chip stocks and news that China’s CXMT has begun producing next-generation memory chips.

Geopolitical tensions in the Middle East and Ukraine also weighed on investor sentiment, though the impact was partially offset by gains in the shipping and energy sectors. Individual semiconductor-related stocks, including Kioxia Holdings and Japan Micronics, saw notable losses.

In the currency markets, the Japanese yen remains sensitive to energy prices and Bank of Japan policy expectations. While wholesale inflation in Japan rose 6.8% year-on-year in September—missing forecasts but remaining elevated—the weak yen continues to drive up import costs, sustaining the case for potential interest rate hikes by the central bank.

Entities

ARK Invest · Bank of Japan · CXMT · Cathie Wood · Federal Reserve · IMF · International Monetary Fund · Japan · Kioxia Holdings · Nikkei 225 · United States · Warren Buffett

Claims

What the coverage asserts, and how many sources carry each claim.

[● 3 SOURCES] The Nikkei 225 index fell by 1,738.53 yen on October 13, 2026. marketpress.jp · gamebiz.jp · gentosha-go.com
[● 2 SOURCES] Japan's wholesale inflation rose 6.8% year-on-year in September. investinglive.com · www.arabnews.jp
[○ 1 SOURCE] The Bank of Japan raised interest rates to 1.25% in September. www.devdiscourse.com
[● 3 SOURCES] Kioxia Holdings was one of the largest decliners in the Nikkei 225. marketpress.jp · www.arabnews.jp · gentosha-go.com
[● 2 SOURCES] The yen-based import price index increased by 24.5% year-on-year. investinglive.com · www.arabnews.jp
[● 2 SOURCES] CXMT announced the start of production for next-generation memory chips. marketpress.jp · gentosha-go.com
[○ 1 SOURCE] The IMF projects Japan's economic growth to be 0.7% in 2026. www.devdiscourse.com
[● 2 SOURCES] Bitcoin traded around the $80,000 level. bitbank.cc · www.nadanews.com