Early Koyo (Autumn Leaves) in Japan: September Viewing Spots

Japan’s autumn foliage, known as koyo or momiji, is a highly anticipated natural spectacle that transforms the landscape into a vibrant tapestry of reds, oranges, and yellows. While the peak viewing season for much of central and southern Japan, including major cities like Tokyo and Kyoto, occurs from late October through November and into early December, early autumn leaves begin to appear in specific regions as early as September. This phenomenon, often referred to as the “koyo front,” gradually sweeps southward across the archipelago.

Regions for Early Autumn Foliage in September

For those seeking to witness the initial signs of autumn in Japan during September, the northernmost regions and higher elevations are the primary locations.

Hokkaido: Japan’s Earliest Autumn Destination

Hokkaido, Japan’s northernmost island, is consistently the first place in the country to experience autumn foliage.

• Daisetsuzan National Park: Located in Hokkaido, Daisetsuzan National Park is renowned as the earliest spot in Japan to see autumn leaves. The colors here can begin to change as early as mid-September.
• Mount Asahidake: The highest peak within Daisetsuzan, Mount Asahidake often sees its leaves start to turn red and yellow at the very beginning of September.
• Other Hokkaido Locations (Mid to Late September):
• Kogen Onsen: Offers fantastic hiking opportunities amidst turning leaves.
• Mount Akan: Another prime location for early autumn colors.
• Noboribetsu (Jigokudani – Hell Valley): Known for its volcanic hot springs and offers beautiful autumn scenery.
• Shikotsu-Toya National Park: Located in southwestern Hokkaido, areas around Lake Shikotsu and Noboribetsu Onsen Jigokudani begin to show autumn leaves.
• Later Hokkaido Peaks: While Sōunkyō, Jozankei Onsen, and Onuma Park in Hokkaido will also showcase beautiful maple leaves, their best viewing periods are typically later, around mid-to-late October.

Tohoku Region (High-Altitude Areas)

The Tohoku region, located in northern Honshu, also offers some early autumn viewing opportunities, particularly in its higher-altitude destinations.

• While most of Tohoku experiences its peak foliage later in October, certain mountainous areas may begin to show colors in late September.
• Lake Chuzenji: This area in Tohoku can be a good spot for early foliage from late September to early November.

General Koyo Information in September

• Elevation Impact: Generally, higher elevation mountainous areas will experience fall foliage earlier than lowlands. This is a consistent pattern across Japan.
• Koyo vs. Momiji: “Koyo” is a general term encompassing foliage with red and yellow colors. “Momiji” specifically refers to the intensely red leaves of Japanese maple trees, which are a highlight of the autumn season. The activity of viewing autumn leaves is known as “momijigari,” a popular tradition for centuries.
• Major Cities (Tokyo, Kyoto): September is generally too early for significant fall colors in major cities like Tokyo and Kyoto. Tokyo’s peak season is generally from late November to early December, while Kyoto’s peak season typically occurs from mid-November to early December.
• Factors Influencing Timing: The precise timing of the turning leaves varies annually, influenced by climatic factors such as temperature, elevation, and latitude. Colder temperatures generally lead to earlier color changes.
• Forecasts: The Japan Meteorological Corporation typically releases its initial autumn foliage forecasts in early September, providing predictions for peak color periods. However, early forecasts should be considered estimates and may be subject to change.

Japanese Public Holidays in September 2025:

• September 15 (Monday): Respect for the Aged Day (Keiro no Hi)
• September 23 (Tuesday): Autumnal Equinox Day (Shūbun no Hi)