South Korea's benchmark Kospi index closed at a new all-time high, breaking through the 9,100 level on Monday.
The rally was broad-based but anchored by a continued surge in semiconductor shares, which have been the primary engine of the market's recent outperformance.
The market's advance was bolstered by shifting geopolitical sentiment.
Reports of progress in diplomatic talks between the United States and Iran helped ease concerns over the prolonged conflict in the Middle East.
This de-escalation narrative reduced risk premiums across Asian equities, creating a favorable backdrop for growth-sensitive sectors like technology.
Semiconductor stocks, a heavyweight component of the Kospi, capitalized on the improved sentiment.