Lake Shirakawa Submerged Forest

Lake Shirakawa Submerged Forest, located in Iide Town, Yamagata Prefecture, is a seasonal natural phenomenon that transforms the landscape for approximately one month from mid-April to mid-May each year. The spectacle occurs when winter snow from the surrounding mountains melts in spring, dramatically raising the water level from late March to late May, causing white yanagi (willow) trees to appear as if growing straight out of the lake's clean blue waters.

The lake itself was created by the construction of Shirakawa Dam, a rockfill dam completed in 1981 after more than a decade of work. The dam required the cooperation of 139 households and serves multiple purposes including flood control, irrigation, water supply, and power production. The submerged forest represents a delicate balance between natural forces and human activity, as the phenomenon depends on both snowmelt from Mount Iide and the dam's water management for rice cultivation.

Visitors can experience two distinct phases of the submerged forest. From late March to mid-April, the "white submerged forest" features bare trunks against lingering snow, while from mid-April to mid-May, the "green submerged forest" emerges as new leaves transform the lake into deeper green hues. Early morning visits are particularly recommended when mist often shrouds the trees in an ethereal atmosphere. The primary viewing area is Shirakawa Dam Lakeside Park, which offers the best vantage points and serves as the hub for activities.

The most popular way to experience the submerged forest is through guided canoe, kayak, or stand-up paddleboard tours that allow visitors to navigate between the tree trunks on the water. Tour operators provide instruction for beginners and families, making the experience accessible to all skill levels. After dark, special illumination events transform the landscape, with battery-operated lights creating a tranquil atmosphere without noisy generators. The lakeside park also features a campground, allowing visitors to immerse themselves in the natural setting, and nearby Shirakawasou hot spring inn offers day bathing and dining with local specialties.

During the peak season from late April through mid-May, parking cooperation fees apply: automobiles pay ¥1,000 and motorcycles ¥500. Additional fees of ¥1,000 apply for evening light-up tours and lake use including canoe experiences. These fees support temporary parking facilities, traffic management, environmental conservation, and tourism infrastructure that helps the local community manage seasonal visitor surges.

From Tokyo, visitors should take the Yamagata Shinkansen to Yonezawa Station (2 hours), then travel 45 minutes by car to reach the destination. Alternatively, travel from Akayu Station on the Yamagata Shinkansen takes approximately 40 minutes by car, or from Tenoko Station on the Yonesaka Line takes about 20 minutes by car.