Goshiki-numa Lake, Nishikawa-machi, Japan (with Map & Photos)

Goshiki-numa Lake, located in Nishikawa-machi in Yamagata Prefecture, is a hidden gem known for its name meaning “five-colored marsh.” Formed by volcanic activity from Mount Gassan, the lake changes colors with the seasons and weather, shifting between emerald green, deep blue, turquoise, and more.

Goshiki-numa Lake in Nishikawa-machi Yamagata Prefecture Japan
Goshiki-numa Lake in Nishikawa-machi Yamagata Prefecture Japan


Surrounded by dense forest and highland scenery, Goshiki-numa is a peaceful destination ideal for hikers, nature photographers, and anyone seeking a quiet escape. The lake is often shrouded in mist, adding to its mystical atmosphere and beauty, especially in autumn when the trees blaze with color.

Unlike the more famous Goshikinuma ponds in Fukushima, this lesser-known lake in Yamagata offers a tranquil and uncrowded experience. Visitors can stroll nearby paths or simply relax and admire the ever-changing water tones reflecting the sky and mountains.

Goshiki-numa is a perfect stop for travelers exploring the Dewa Sanzan area or making their way to Mount Gassan, offering a serene glimpse into Japan’s volcanic landscapes and natural magic.

  • Highlights:
  • Volcanic lake with five shifting water colors
  • Tranquil, uncrowded nature setting
  • Perfect for photographers and hikers
  • Close to Mount Gassan and Dewa Sanzan
  • Stunning autumn foliage and mountain views

Goshiki-numa Lake Map