The Japanese stock market experienced a slight decline today, with the Nikkei 225 index down by 0.3%. However, the index has shown a robust performance over the past month, gaining 12.13%. In the large-cap segment, Oracle Corp Japan emerged as the top performer, achieving a return of 7.98%, while Ebara Corp lagged behind with a decline of 6.51%. The mid-cap sector saw AGC, Inc. (Japan) leading with a return of 9.09%, contrasted by ITO EN, LTD., which fell by 10.98%. Small-cap stocks displayed notable volatility, with Fixstars Corp. posting an impressive return of 16.73%, while Datasection, Inc. faced a significant drop of 17.89%. Overall, the advance-decline ratio across the market indicated that 978 stocks advanced compared to 2,521 that declined, resulting in a ratio of 0.39. In the large-cap category, 72 stocks advanced against 101 that declined, yielding a ratio of 0.71. Mid-cap stocks had 89 advancing and 177 declining, with a ratio of 0.5, while small-cap stocks showed 437 advancing versus 1,252 declining, resulting in a ratio of 0.35.