Lake Akan

阿寒湖

A beautiful crater lake in Akan National Park famous for marimo algae and Ainu cultural experiences. Home to traditional villages and excellent hiking with opportunities to learn about Japan's indigenous heritage.

Things to do

• Marimo Observation and Museum — Visit the Marimo Museum at Lake Akan to learn about and observe the rare spherical algae endemic to this lake, displayed in large aquariums and explained through interactive exhibits.
• Ainu Village (Ainu Kotan) Walk — Stroll through the traditional Ainu settlement with wooden houses where artisans demonstrate traditional crafts like carving and weaving, and share indigenous culture.
• Lake Akan Scenic Boat Tour — Take a leisurely boat cruise around the crater lake to see marimo habitats, forested shores, and learn about the geological formation from onboard commentary.
• Meakan Volcano Hike — Climb the active volcano on the eastern shore for panoramic views of the lake and surrounding Akan National Park with well-maintained hiking trails.
• Onsen (Hot Spring) Bathing — Soak in traditional hot springs overlooking the lake at numerous ryokan and public bath facilities heated by geothermal activity.
• Onneto Lake Loop Walk — Hike the scenic 3.5 km loop around sister lake Onneto, known for its five different colored zones caused by mineral content and algae.

Food to try

• Himema (Char) Grilled Fish — A prized local freshwater char caught from Lake Akan, grilled whole with salt and served at lakeside restaurants for its delicate white flesh.
• Marimo Souvenir Sweets — Green tea-flavored confections shaped like marimo algae balls, sold as local souvenirs and treats unique to the Lake Akan region.
• Venison (Shika) Hotpot — A warming traditional Ainu and Hokkaido dish featuring locally hunted deer meat cooked in a communal pot with vegetables and local vegetables.
• Akan Lamb Genghis Khan — Grilled lamb cooked on a dome-shaped metal plate with seasonal vegetables, a regional specialty reflecting Hokkaido's pastoral heritage.
• Crayfish (Ebi) Tempura — Freshwater crayfish from local streams prepared as light, crispy tempura and served as an appetizer at lakeside restaurants.

Local customs & good to know

• Respectful Marimo Observation — Treat marimo as sacred natural treasures; do not touch or remove them from displays, as they are protected and considered precious to both the ecosystem and Ainu culture.
• Learn Basic Ainu Greetings — Locals appreciate visitors who attempt Ainu words like 'Irangka!' (hello) or 'Kor' (thank you), showing respect for indigenous heritage.
• Onsen Etiquette — Always wash thoroughly before entering communal hot springs, remove tattoos appropriately as per facility rules, and keep noise levels low out of respect for other bathers.
• Visit Museums During Shoulder Seasons — Autumn (September-October) and early spring offer the best weather and smaller crowds, allowing deeper engagement with Ainu cultural experiences and guides.