The Japanese stock market experienced a slight decline today, with the Nikkei 225 index down by 0.47%. However, the index has shown a robust performance over the past month, gaining 9.65%. In the large-cap segment, KONAMI Group Corp. emerged as the top performer, achieving a return of 10.25%, while Nintendo Co., Ltd. faced challenges, recording a decline of 8.44%. The mid-cap sector saw TOKYO OHKA KOGYO CO., LTD. leading with a notable return of 15.5%, contrasting with JMDC, Inc., which struggled with a drop of 20.8%. Small-cap stocks displayed significant volatility, with Nippon Thompson Co., Ltd. soaring by 24.39%, while HOKUETSU INDUSTRIES CO., LTD. fell by 18.35%. Overall, the advance-decline ratio across the market indicated a positive trend, with 1,868 stocks advancing compared to 1,630 declining, resulting in a ratio of 1.15. Notably, small-cap stocks had the strongest performance, with a ratio of 1.33, reflecting a healthy market sentiment among smaller companies.