Momiji, or autumn foliage, refers to the vibrant colors of leaves during the fall season, particularly in Japan. This natural phenomenon occurs as temperatures drop, causing chlorophyll in leaves to break down, revealing brilliant hues of red, orange, and yellow. The sight of these colorful leaves attracts many visitors to parks and gardens. In Japan, momiji is celebrated through various cultural practices, including momijigari, or leaf-peeping excursions. Popular locations for viewing autumn leaves include Kyoto and Nikko, where ancient temples and shrines are surrounded by stunning landscapes. The beauty of momiji symbolizes the transient nature of life, a theme often reflected in Japanese art and poetry.