The Japanese stock market experienced a notable downturn today, with the Nikkei 225 index declining by 3.06%. Over the past five days, the index has seen a more significant drop of 4.21%, although it remains up by 2.85% over the last 30 days. In terms of market performance, the advance-decline ratio indicates a challenging environment, with 344 stocks advancing compared to 3,353 declining, resulting in a ratio of 0.1 across the market. Large-cap stocks fared particularly poorly, with only 6 advancing against 169 declining, yielding a ratio of 0.04. Mid-cap stocks showed a slightly better performance, with 19 advancing and 252 declining, while small-cap stocks had 122 advancing versus 1,654 declining. Among individual stocks, Tokyo Gas Co., Ltd. emerged as the best performer in the large-cap category, posting a return of 2.24%. Conversely, TDK Corp. struggled, recording a decline of 10.38%. In the mid-cap sector, Mitsubishi Gas Chemical Co., Inc. led with a return of 5.04%, while Sumitomo Pharma Co., Ltd. faced a significant drop of 19.1%. The small-cap segment saw Seikoh Giken Co., Ltd. excel with a return of 14.81%, while Daidoh Ltd. suffered a steep decline of 24.77%.