Tokyo, Jan. 5 (Jiji Press)--Japan's benchmark Nikkei 225 stock average soared on Monday, the first trading day of 2026, led by gains in large-cap semiconductor-related shares. The index of 225 major issues listed on the Tokyo Stock Exchange's top-tier Prime section finished at 51,832.80, up 1,493.32 points, or 2.96 pct, from Tuesday, the final trading day of 2025. It briefly topped 52,000 f...