South Korea's Kospi index closed at a fresh 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.
Investors rewarded the sector's momentum as broader risk appetite improved across Asian equity markets.
The positive sentiment followed reports of progress in peace talks between the United States and Iran, easing geopolitical tensions that had previously weighed on global markets.
This diplomatic development provided a tailwind for risk assets, allowing the semiconductor-led rally to extend into new territory.
The convergence of sector-specific strength and macro-level optimism created a powerful upward push for the benchmark index.