Nature— winter
Tohoku in Winter: Zao's Ice Monsters and Snow Country
On the slopes of Mount Zao in Yamagata, winter storms coat the snow-covered trees in layers of ice until they become vast white sculptures — the juhyo, or ice monsters. It is one of Japan's most otherworldly natural phenomena, and it happens only here.
The gondola rises through cloud. For several minutes, you see nothing but white. Then the clouds part briefly and there they are: thousands of trees, each one encased in a smooth white shell of ice, their branches compressed by the weight until they resemble robed figures in procession across the slope. From a distance, they look like an army of monks. From close up, they look like nothing else on earth.
How the Juhyo Form
The juhyo — literally "ice trees" — are created by a specific combination of temperature and moisture that occurs only on the upper slopes of Mount Zao. Moisture from Lake Okama, the volcanic crater lake near the summit, rises and freezes on the surface of the fir trees. Successive storms add layer upon layer of ice and snow until the trees themselves disappear beneath white forms that can weigh hundreds of kilograms. The season runs roughly from late January through mid-March, depending on snowfall.
The Night Illumination
On selected evenings throughout February, the Zao Onsen ski resort illuminates the juhyo field with coloured lights — blue, purple, green — turning the ice forms into something between natural wonder and installation art. The night gondola operates on these evenings, and the viewing platform at the top fills with visitors who stand mostly in silence, photographing shapes that photography cannot fully capture.
The Onsen Below
At the base of the gondola, Zao Onsen village has been a hot spring resort for over 1,900 years. The water here is highly acidic — among the most acidic hot spring water in Japan — turning coins green and hair temporarily copper. It is excellent for the skin and remarkable to soak in while looking up at a mountain that is quietly building its annual crop of ice monsters. Accommodation ranges from simple minshuku guesthouses to mid-range ryokan with private baths. Book for at least two nights to allow flexibility around weather and gondola access.