Asian stock markets opened on a positive note, with South Korea's KOSPI Index experiencing a significant surge. On Monday, June 15, the KOSPI Index rose by 425.23 points, marking a 5.23% increase to reach 8,548.85. Meanwhile, Japan's Nikkei 225 Index also saw gains, opening up 858.13 points, or 1.30%, at 66,878.17. These movements reflect a strong start for the Asian markets at the beginning of the trading week.