The Japanese stock market exhibited mixed performance today, with the Nikkei 225 index rising by 0.26%. However, over the past 30 days, the index has seen a decline of 1.61%. In the large-cap segment, Japan Post Insurance Co., Ltd. emerged as the top performer, posting a return of 2.73%, while Rakuten Bank Ltd. struggled, recording a loss of 2.65%. In the mid-cap category, DOWA Holdings Co., Ltd. led the pack with a notable return of 7.05%, contrasting sharply with JMDC, Inc., which faced a decline of 6.38%. The small-cap sector saw impressive gains from Medical Data Vision Co., Ltd., which surged by 62.31%, while S-Science Co., Ltd. lagged behind with a loss of 13.51%. Overall, the advance-decline ratio across the market showed 1,540 stocks advancing against 1,960 declining, resulting in a ratio of 0.79. The large-cap stocks had a particularly challenging day, with only 67 advancing compared to 107 declining, yielding a ratio of 0.63. Mid-cap stocks also faced headwinds, with 99 advancing and 171 declining, while small-cap stocks fared slightly better with 759 advancing against 933 declining.