Guida
Lake Utonai is a freshwater lake located in the eastern part of Tomakomai City, Hokkaido. The surrounding area features a unique topography with low-lying wetlands and various marshes such as Bentenuma. Covering an area of approximately 275 hectares, it holds a significant place in history as Japan's first designated bird sanctuary and remains a globally important ecosystem as a Ramsar Convention wetland. The landscape is characterized by rich natural environments, including aquatic plants like Lemna and water primrose, alongside dense thickets of reeds and cattails.
The name of the lake is derived from the Ainu word 'utnay-to,' meaning 'the swamp of Utnay.' Originally referred to as 'Kimunt' (mountain swamp) or 'Kimuketo' (deep mountain swamp), the name changed to 'Utunai' (rib/river) because the way the river flows from the lake resembles a spine and ribs. In 1981, the Nature Conservation Society of Japan designated it as the country's first bird sanctuary, and in 1991, it became the fourth Ramsar site in Japan. While the area once hosted hot spring facilities and an amusement park, the priority has long since shifted to strict nature conservation.
The greatest draw is its role as a vital stopover for migratory birds. During peak migration seasons, visitors can observe tens of thousands of geese and swans arriving at the lake. With over 250 bird species recorded, the variety of wildlife changes beautifully with the seasons. In winter, much of the lake freezes over, but due to local feeding efforts, a certain number of birds remain in the area as resident species. It is a precious spot where you can truly feel the cycles of nature.
The bird species you can observe vary significantly by season. During migration periods, you can witness massive flocks filling the sky. In winter, the landscape changes dramatically as the lake freezes. Interestingly, because flight paths for aircraft heading to New Chitose Airport pass directly over the lake, you may even be able to spot white swans flying through the air from the ground during southern approaches. We recommend adjusting your visit time based on the weather and season for the best experience.
The primary activity is birdwatching. You can enjoy a peaceful stroll around the wetlands and lakeshore to appreciate the scenery. The 'Utonai Lake Sanctuary Nature Center' is located nearby, offering deeper insights into the local ecosystem. As this is a protected nature reserve, visitors are expected to interact with nature quietly and respectfully.
National Route 36 runs to the west of the lake, providing good access. The surrounding area includes facilities related to nature conservation, making it an excellent place for environmental learning. While leisure facilities once existed nearby, the area is now a serene and quiet natural environment.
As this is a protected nature reserve, maintaining silence is crucial for observing wildlife. Please follow these guidelines: