Hokkaido Official Tourism Site HOKKAIDO LOVE!

Experience the breathtaking sight of Japan’s largest coral grass colony, where the shores of Lake Notoro transform into a vibrant sea of red every autumn.

Located along the scenic shores of Lake Notoro in Abashiri City, this expansive natural wonder is home to one of Japan’s most spectacular seasonal displays. The salt-tolerant coral grass, known officially as Akkeshi-so, creates a living landscape that shifts from lush summer greens to a fiery, brilliant crimson as the air cools in September. This precious plant, featured on the Ministry of the Environment’s Red List, spans about 3.8 hectares, creating a natural masterpiece that looks like a hand-woven red carpet spread across the earth.

As you wander along the well-maintained wooden boardwalks, the gentle scent of the sea breeze fills the air, and you can observe the unique, delicate texture of the swaying coral grass up close. The vivid contrast between the clear blue sky, the tranquil lake surface, and the endless stretch of deep red is a sight that truly resonates with the spirit. During the peak season in mid-September, the "Lake Notoro Coral Grass Festival" brings the area to life, celebrating this fleeting moment of autumn beauty. This iconic Hokkaido landscape offers a peaceful yet powerful encounter with nature that you will remember long after your journey ends.