TOKYO KEIKI is trading at ¥5,980, down 8.98%, alongside a sharp Tokyo market selloff. - On October 15, the Nikkei dropped 4.90% amid technology-stock selling, concerns about AI investment, and higher U.S. interest rates. - No October 15 company-specific announcement explaining the decline was identified. The latest reported company news was its October 6 alliance with Tokyo Artisan Intelligence. - Available evidence points to broad market sentiment rather than a confirmed company-specific catalyst.