After hours: 6286.T Seiko up 20.62% to JPY 1,755.00: earnings in focus

Seiko Corporation (6286.T) surged in after hours trading, rising 20.62% to JPY 1,755.00 on 20 Feb 2026 after the regular session. The sharp move followed higher-than-expected trading interest and refreshed investor focus ahead of Seiko’s next earnings announcement. This article reviews the move, key fundamentals, technical signals, and Meyka AI’s grade and forecast for 6286.T stock to help investors interpret the momentum and risks in Japan’s JPX market.