Japan's Nikkei ends lower as SoftBank Group tracks Oracle's declines

Japan's Nikkei share average closed 0.9% lower, led by a sharp 7.69% decline in SoftBank Group. This fall mirrored Oracle's significant drop after missing U.S. earnings forecasts, raising concerns about their joint AI data center project. Other tech and bank shares also declined, though Advantest and Mitsui & Co bucked the trend.