Autumn Leaf Colors in Japan: Koyo Season

Yes, Leaves Change Color

The phenomenon is called kōyō (紅葉) or momiji (紅葉).

Science

As daylight decreases and temperatures drop, chlorophyll (green) breaks down, revealing carotenoids (yellow/orange) and anthocyanins (red).

Peak Viewing

Mid-November to early December (varies by region and elevation).

Famous Spots

• Kyoto: Temples, Arashiyama Bamboo Forest.
• Tokyo: Shinjuku Gyoen, Yoyogi Park, Meiji Shrine.
• Hakone: Views of Mt. Fuji with autumn foliage.
• Nikko: UNESCO shrines amid colorful mountains.

Cultural Significance

Momijigari (leaf-peeping) is a centuries-old tradition; seasonal foods, festivals, and poetry celebrate the fleeting beauty.