The Japanese stock market experienced a notable downturn today, with the Nikkei 225 index declining by 2.5%. Over the past five days, the index has seen a more significant drop of 4.2%. However, in a longer-term perspective, the Nikkei 225 has rebounded impressively, gaining 9.71% over the last 30 days. In terms of individual stock performance, Obayashi Corp. emerged as the top performer in the large-cap category, achieving a return of 8.5%. Conversely, SoftBank Group Corp. struggled, recording a decline of 10.02%. Among mid-cap stocks, NH Foods Ltd. led with a return of 13.07%, while HIROSE ELECTRIC CO., LTD. faced challenges, dropping 16.07%. In the small-cap sector, BrainPad, Inc. excelled with a remarkable return of 29.75%, while Quantum Solutions Co., Ltd. fell by 11.8%. The overall market showed a significant imbalance in stock performance, with 1,034 stocks advancing compared to 2,566 declining, resulting in an advance-decline ratio of 0.4 across the market. This trend was mirrored in the large-cap and small-cap segments, where the ratios were 0.59 and 0.34, respectively, indicating a challenging environment for investors.