In eastern Hokkaido, surrounded by primeval forest, lies the mystical Lake Akan—a caldera lake formed approximately 150,000 years ago through volcanic activity. With a circumference of about 26 kilometers and maximum depth of 45 meters, this lake is world-renowned as the habitat of the nationally designated Special Natural Monument “Marimo” (moss balls), attracting approximately 1.5 million visitors annually to this premier power spot of eastern Hokkaido.
Standing on the lakeshore, the twin peaks of Mount Oakan and Mount Meakan rise majestically as if standing guard over the lake, their divine presence leaving visitors breathless. Particularly in early morning, when the lake surface is shrouded in mist, the scene becomes truly ethereal—and one begins to understand why the Ainu people have long revered this place as “Kamuy-to” (Lake of the Gods).
Here, Ainu culture—where nature itself is worshipped as divine—continues to thrive. The unique power created by the fusion of this spirituality and pristine natural energy heals visitors and awakens new awareness within them.
The Allure of This Sacred Site
Lake Akan’s creation dates back approximately 150,000 years. Volcanic activity formed a caldera that gradually filled with water, evolving over eons into its present form. The first inhabitants of this land were the Ainu people. They called Lake Akan “Kamuy-to” (Lake of the Gods) and offered prayers of gratitude and reverence to the gods (Kamuy) dwelling in the lake, surrounding mountains, and forests. Mount Meakan was especially sacred, known as “Fure-betsu” (Red Mountain), believed to house the goddess of fire. In 1934, the Lake Akan area was designated as part of Akan-Mashu National Park. In 1952, Marimo received designation as a Special Natural Monument, ensuring protection of this globally rare natural treasure. Lake Akan’s most distinctive feature is its exceptional transparency and mystical coloration. The cobalt-blue waters, created by volcanic minerals and pure water flowing from surrounding primeval forests, represent nature’s own artistry. Around the lake stretches virgin forest of centuries-old Ezo spruce and Sakhalin fir, home to diverse wildlife including Ezo deer, red foxes, and white-tailed eagles. This ecological richness is said to be the source of Lake Akan’s energy. The most famous natural miracle here is “Marimo.” These spherical moss formations can grow to over 30 centimeters in diameter and exist in such form only in Lake Akan and parts of Iceland—an extremely rare phenomenon. Their round shape has long been considered a symbol of “connections” and “harmony,” making them traditional good luck charms. What makes Lake Akan a special power spot is the fusion of “nature worship” and “Ainu culture.” The Ainu people have believed that “Kamuy” (gods) dwell in all things natural. Lakes, mountains, fire, wind, animals, plants—all are sacred beings, with humans coexisting as part of nature. This philosophy deeply connects with the modern concept of “power spots.” The many visitors who report feeling “watched over by something” or experiencing “purification of the heart” may be sensing the accumulated “ki” of a place where people have offered prayers for thousands of years.Architecture and Natural Features
What Makes This Spot Special
Spiritual Benefits and Effects
The following benefits are associated with Lake Akan: Matchmaking: Marimo’s round shape symbolizes “circles” (connections), believed to possess power to unite people. The “Marimo charms” sold at the Ainu Kotan are popular as matchmaking amulets. Wish Fulfillment: By offering prayers to the Ainu gods, visitors seek support for their wishes to come true. Time spent quietly praying by the lakeshore is particularly effective for organizing thoughts and clarifying goals. Purification and Reset: The pure air and water of Lake Akan are said to have cleansing effects on mind and body. Many visitors carrying fatigue and stress report feeling “reset” after their visit. Lake Akan is said to possess energy of “harmony and balance.” The geography of Mount Oakan (masculine energy) and Mount Meakan (feminine energy) facing each other across the lake symbolizes yin-yang balance. This harmonized energy is believed to restore balance to visitors’ minds and bodies. Additionally, watching Marimo grow slowly over hundreds of years conveys the message “grow steadily without rushing.” For those at life’s crossroads or feeling impatient, Lake Akan provides important insights. “While meditating by the lake for about 30 minutes, an answer to a problem I’d been struggling with suddenly came to me. The power of nature is incredible.” (Woman in her 50s, Kanagawa) “Learning about Ainu culture while gazing at the lake, gratitude for nature naturally welled up inside me. It reminded me of important things easily forgotten in daily life.” (Man in his 40s, Osaka)The Unique Energy of This Site
Visitor Testimonials
Best Times to Visit
The season when the lake awakens with the melting snow. Cruise boats begin operating from mid-May, offering beautiful contrast between fresh greenery and lingering snow on Mount Meakan. Temperature 5-18°C; warm clothing essential for mornings and evenings. The peak tourist season. Temperatures of 18-25°C make it comfortable, with abundant lakeside activities. From July to September, the Marimo Exhibition and Observation Center allows close viewing of real Marimo. Peak autumn colors occur late September to mid-October. The primeval forest blazes in reds and yellows, with reflections on the lake surface creating breathtaking beauty. Fewer tourists make this ideal for those seeking quiet power. During the deep freeze (January-March), the lake freezes completely, enabling ice fishing for smelt and snowshoe tours. The “Lake Akan Ice Festival” (February) features fireworks and ice candles creating fantastic illuminations. Temperatures can drop below -20°C. Early Morning (5-7 AM): The mystical lake shrouded in morning mist is a must-see. Walking while listening to birdsong offers the ultimate purification experience. Daytime (10 AM-3 PM): Ideal for cruise boats and the Marimo Observation Center. Best time for activities. Evening (5-7 PM): The lake and mountain silhouettes bathed in sunset light create spectacular views. Summer’s late sunsets allow extended enjoyment.
Recommendation: ★★★★☆Summer (July–August)
Recommendation: ★★★★★Autumn (September–October)
Recommendation: ★★★★★Winter (November–April)
Recommendation: ★★★☆☆ (★★★★★ for those seeking unique experiences)Best Times of Day
Visitor’s Guide
1. Arrive at Akan Onsen: Park in free lot (approximately 300 spaces) and head to the lakeshore Bokke (Mud Volcano): Located along the lakeside promenade, this mud volcano bubbles with geothermal heat—a spot to directly feel Earth’s energy. Churui Island Marimo Exhibition Center: Accessible only by cruise boat, this island offers close observation of natural Marimo and their life force. Ainu Kotan: An area of approximately 30 Ainu craft shops. Experiencing the Ainu worldview teaches the spirit of nature worship. Mount Meakan (Hiking): About 2.5 hours one-way to the summit. The mystical blue of the crater lake “Ao-numa” is worth the climb. Various cultural experiences are available at Ainu Kotan:
2. Lakeside Walk: Stroll the approximately 2km promenade to absorb the lake’s atmosphere
3. Cruise Boat: Visit the Marimo Exhibition Center on Churui Island (approximately 85-minute course)
4. Ainu Kotan Visit: Experience traditional culture and purchase charms
5. Café Rest: Savor local cuisine while soaking in the atmosphereSpecial Points of Interest
Ainu Cultural Experiences
Dress Code and Etiquette
Basic Information
Address: Akanko Onsen, Akan-cho, Kushiro City, Hokkaido By Car: By Public Transportation:
Facility Information
Area Information
Lake Onneto (20 minutes by car): A mystical lake that changes to five different colors. Located at the foot of Mount Meakan, its water color shifts with time and weather, earning it the name “Five-Color Marsh.” Lake Mashu (60 minutes by car): Famous as “Misty Lake Mashu,” this caldera lake boasts the world’s second-highest transparency. The lake viewed from the observation deck possesses mystical beauty. Mount Io (50 minutes by car): An active volcano still emitting steam. A spot to directly feel Earth’s energy. Nabehisa Poronno Folk Café Pan de Pan Half-Day Course (Approximately 4 hours) Full-Day Course (Approximately 8 hours)Recommended Restaurants
Souvenirs and Local Products
Model Itineraries
10:00 Arrive at Akanko Onsen, lakeside walk
10:30 Board cruise boat to Marimo Center
12:00 Lunch at Nabehisa
13:00 Ainu Kotan exploration, souvenir shopping
14:00 Depart
8:00 Early morning lakeside walk
9:00 Board cruise boat
10:30 Bokke viewing
11:30 Lunch and cultural experience at Ainu Kotan
14:00 Lake Onneto visit
16:00 Hot spring bath
18:00 Dinner, then depart
Visitor Reviews and Experiences
“Marimo gave me energy” (Woman in her 30s, Chiba)
“Seeing Marimo from the cruise boat, I was moved by how they’ve grown over hundreds of years. It made me think I too should grow step by step without rushing.”
“Deeply moved by Ainu culture” (Couple in their 60s, Hyogo)
“Watching the traditional Ainu dance, we were impressed by the wisdom of living with nature. The lake, mountains, forest—everything began to feel sacred.”
“I’ll never forget the early morning lake” (Man in his 40s, Fukuoka)
“I woke early and walked by the lake. When Mount Meakan emerged from the morning mist, I got goosebumps. I’ll never forget that sight.”
Frequently Asked Questions
Q: Can I take Marimo home?
A: Natural Marimo are protected as Special Natural Monuments and cannot be collected. Cultivated Marimo can be purchased at souvenir shops (from ¥500).
Q: Is the area open for tourism in winter?
A: Yes, winter-only activities are abundant. However, cruise boats are suspended, replaced by ice fishing and snowmobile tours.
Q: Can I walk around the entire lake?
A: There’s no path for a complete circuit, but approximately 2km of promenade exists around the onsen town.
Q: Can I visit without a car?
A: Buses run from Kushiro Station and airports, but departures are limited—check timetables in advance.
Summary
Lake Akan is a caldera lake with approximately 150,000 years of history, a premier power spot where Ainu culture and pristine nature converge in Hokkaido.
This mystical lake, home to the globally rare Marimo and watched over by Mounts Oakan and Meakan, overflows with energies of “harmony,” “purification,” and “matchmaking.” The spirituality that the Ainu people have revered for thousands of years as “Kamuy-to” (Lake of the Gods) continues to heal visitors and awaken new awareness within them.
For those seeking to reset mind and body, those at life’s crossroads, or those wishing for important connections—Lake Akan quietly embraces you and grants the power to move forward.
Why not embark on a journey to this miraculous lake created by Hokkaido’s great nature, to remember gratitude and reverence for the natural world?
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*Information in this article is current as of December 2025. Please verify the latest details on official websites before visiting.*
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