The Japanese stock market experienced a downturn today, with the Nikkei 225 index declining by 1.12%. Over the past five days, the index has seen a slight decrease of 0.2%, although it remains up by 7.24% over the last month, indicating a mixed performance in the short term. In terms of market capitalization, large-cap stocks faced challenges, with only 49 advancing against 127 declining, resulting in an advance-decline ratio of 0.39. The standout performer in this category was IHI Corp., which posted a return of 5.18%, while Aisin Corp. struggled with a loss of 8.67%. Mid-cap stocks also showed weakness, with 63 advancing and 206 declining, leading to a ratio of 0.31. Mitsui Mining & Smelting Co., Ltd. emerged as the best performer in this segment, achieving a return of 5.44%. Conversely, Sumitomo Pharma Co., Ltd. faced significant losses, down 15.6%. Small-cap stocks had the most pronounced disparity, with 375 advancing and 1,365 declining, resulting in a ratio of 0.27. Eiken Chemical Co., Ltd. led this group with an impressive return of 19.8%, while Sumiseki Holdings, Inc. fell by 12.39%. Overall, the market reflects a challenging environment, with a notable number of declining stocks across all categories.