Japanese stocks opened lower on Monday, with the Nikkei 225 index falling 1.6%. The decline was primarily driven by weakness in chip and metals sectors, reflecting broader market anxieties.

Investor sentiment appears to be impacted by ongoing uncertainty surrounding the geopolitical situation in the Middle East, particularly concerning potential escalation of conflict involving Iran. Additionally, anticipation regarding future policy decisions by the U.S. Federal Reserve is contributing to market apprehension.

The drag from technology and materials stocks highlights the sensitivity of the Japanese market to global economic conditions and international developments. The confluence of these factors has led to a cautious trading environment, with investors reassessing risk exposure.