South Korea's benchmark KOSPI index climbed 4.69%, adding 316.67 points to close at 7,064.62 on Wednesday.
The broad-based rally was anchored by heavy buying in the technology sector, as investors rotated capital back into artificial intelligence and memory chip stocks ahead of a busy week of earnings reports from major US technology firms.
The surge in semiconductor shares reflects growing optimism about the sector's near-term outlook.
Market participants are positioning for potential upside from upcoming results by US memory chipmakers, which have historically influenced sentiment across Asian peers.
The buying pressure suggests traders are betting on continued strength in data center demand and memory pricing, despite broader macroeconomic uncertainties.
This move follows a similar rally earlier in the week, when the KOSPI briefly reclaimed the 9,000-point level on Thursday, driven by upbeat quarterly results and a strong forecast from US memory chipmaker Micron Technology.