What Is Kushiro Marsh? Experience Nature in Japan’s Largest Wetland
Kushiro Marsh (Kushiro Shitsugen) is Japan’s largest wetland, spanning Kushiro City, Kushiro Town, Shibecha Town, and Tsurui Village in eastern Hokkaido.
The wetland covers about 22,000 hectares, and the national park totals about 28,788 hectares—an overwhelming scale.
In 1980, it became Japan’s first Ramsar Convention site (registered area: 7,863 hectares), and in 1987 it was designated a national park, carefully protecting its pristine nature.
The marshland is home to diverse wildlife and is especially famous worldwide as a habitat for the red-crowned crane (Tanchō), a Special Natural Monument of Japan.
With activities like canoeing, trekking, and wildlife watching, it offers many ways to feel the power of the great outdoors.
Why Kushiro Marsh Is Special: Highlights and Must-Sees
A Vast Wetland Formed Over About 3,000 Years
Kushiro Marsh is one of Japan’s leading lowland wetlands, formed over about 3,000 years as a former sea area filled with accumulating peat.
Reeds and sedges spread across the marsh, and depending on the area, you can also see sphagnum moss communities and alder forests.
From spring to summer, skunk cabbage and Ezo daylilies bloom, while winter brings an expansive silver-white landscape.
In the early morning and at dusk, mystical fog can blanket the marsh, revealing a constantly changing atmosphere.
Rare Wildlife, Including the Red-Crowned Crane
Kushiro Marsh is known as Japan’s largest breeding ground for the endangered red-crowned crane.
In winter (December to March), you can sometimes see elegant “courtship dances” at feeding sites in Tsurui Village, attracting many photography enthusiasts.
The marsh and surrounding areas are also home to Hokkaido sika deer, red foxes, white-tailed eagles, Steller’s sea eagles, and more.
Activities to Enjoy in Kushiro Marsh
Canoe Tours Down the Kushiro River
One of the most popular activities in Kushiro Marsh is joining a canoe tour down the Kushiro River.
Classic routes include courses from around Lake Tōro (Tōro-ko) toward the Hosooka area, with an estimated duration of about 1 hour 30 minutes to 2 hours.
Gliding along calm waters while surrounded by birdsong and the sound of wind offers a truly extraordinary escape.
Many guided tours are available for beginners, and the best season is May to October.
Scenic Treks From Observation Decks
Kushiro Marsh has several observation decks where you can enjoy panoramic wetland views.
Hosooka Observatory (Hosooka Tenbōdai) is a popular spot overlooking the meandering Kushiro River and the full marsh landscape, and sunsets here are especially breathtaking.
From the Kushiro Shitsugen Observatory (Kushiro-shi Shitsugen Tenbōdai), a roughly 2.5-kilometer boardwalk trail is maintained, letting you trek while observing wetland vegetation up close (about 1 hour is a useful guide).
Boardwalks are also maintained around the Onnenai Visitor Center (Onnenai Bijitā Sentā), making it a popular, easy stroll route.
Ride the Kushiro Shitsugen Norokko-gō Sightseeing Train
The JR Kushiro Shitsugen Norokko-gō, a limited summer-season sightseeing train, runs slowly between Kushiro Station and Tōro Station over about 50 minutes.
Large windows let you relax and enjoy marsh scenery, and onboard announcements introduce key highlights along the way.
Seasonal Highlights and Climate
Spring and Summer (May to August): Fresh Greenery and Flowers
From spring into summer, Kushiro Marsh turns lush green, with many flowers blooming across the landscape.
In May, skunk cabbage appears; in June to July, Ezo daylilies and Japanese iris reach their best season, wrapping the marsh in bright color.
However, even in summer, Kushiro temperatures are cool at around 20°C, and foggy days are common, so bringing a long-sleeve layer is reassuring.
Autumn (September to October): Golden Marsh and Clear Air
In autumn, the marsh turns golden, and you can enjoy expansive seasonal scenery in crisp, clear air.
With fewer visitors than in summer, it’s an ideal season for those who want a quiet, unhurried walk.
Winter (November to March): Red-Crowned Crane Dances and a Silver World
Winter brings an expansive silver landscape and a dreamlike atmosphere in the freezing air.
Red-crowned crane courtship dances can be seen from January to March, with Tsurui Village feeding sites, the Itō Tanchō Sanctuary, and the Akan International Crane Center known as observation spots.
Winters in Kushiro can be extremely cold, so be sure to prepare proper cold-weather gear.
How to Get to Kushiro Marsh and Nearby Sightseeing
Access to Kushiro Marsh
Getting to the observation decks and visitor centers in Kushiro Marsh typically takes about 20–40 minutes by car from central Kushiro.
From Kushiro Airport, it’s about 30–40 minutes by rental car. Bus services are limited, so renting a car is convenient.
Nearby Sightseeing Spots
- Kushiro Shitsugen Observatory
- A spot where you can enjoy sweeping panoramic views of the marsh.
- Admission is 480 yen for adults. You can also walk the trails, and the scenery at dusk is especially unmissable.
- Akan Lake Onsen
- About 1 hour by car from Kushiro Marsh. A hot spring town spreads along the shores of Lake Akan, famous for marimo algae balls.
- At Ainu Kotan, you can also enjoy Ainu cultural experiences and shopping for traditional crafts.
What to Bring and Things to Know
Packing Tips
- Clothing
- Because Kushiro stays cool even in summer, a long-sleeve layer or windbreaker is reassuring. In winter, warm outerwear, gloves, a hat, and heat packs are essential.
- Useful items
- Binoculars make it easier to spot wild birds and distant cranes. A telephoto lens is also recommended for cameras.
- Because boardwalks and trails can be uneven in places, comfortable sneakers or trekking shoes are a good choice.
Summary
Kushiro Marsh is a globally precious place, offering Japan’s largest wetland, a unique ecosystem, and vast natural scenery.
Encounters with seasonal landscapes and rare wildlife such as the red-crowned crane can become lifelong memories.
When you visit Hokkaido, be sure to experience the richness of Japan’s great outdoors at Kushiro Marsh.
