The festival that celebrates the arrival of autumn in Japan, marked by colorful foliage and harvest-related activities, is known as Koyo or Shuubun no Hi. This seasonal celebration typically features festivals held in parks and temples, offering various activities such as leaf-viewing events and rice harvesting ceremonies. Communities gather to appreciate nature's beauty, enjoy local delicacies, and engage in traditional games, enhancing the communal spirit and appreciation for the seasonal transition.