Every year around this time, a winter message arrives in the eastern part of Hokkaido, on the Sea of Okhotsk: the drift ice. This region of Hokkaido is the only place in Japan where you can see it! We're looking forward to news of the drift ice from the Okhotsk coast again this year. But do you really know how this 'ryuhyo' (drift ice) is formed and where it comes from?

What is Drift Ice?

Drift ice refers to ice floating in the sea, but more precisely, it's 'sea ice'—ice formed from frozen ocean water. This floating sea ice is called drift ice, while sea ice that is attached to the coastline and doesn't move is called 'fast ice' to distinguish it.

Where Does the Drift Ice Come From?

A rough map

In the Sea of Okhotsk, strong northwesterly seasonal winds from Siberia blow out over the sea, causing sea ice to form continuously along the coast. This ice is carried by the East Sakhalin Current, repeatedly freezing and drifting. The sea ice, which flows along the east coast of Sakhalin, thickens in the cold and travels all the way to the Okhotsk coast of Hokkaido.

It's Not Just Ice That Drifts In!

The 'Clione,' also known as the sea angel (or drift ice fairy), arrives along with the ice.

Despite their cute appearance, Clione are also known for their fearsome way of eating. Besides Clione, you can also see seals and white-tailed eagles, which migrate from Russia for the winter, resting on the drift ice.

What Do "Ryuhyo Shonichi," "Ryuhyo Setsugan Shonichi," and "Ryuhyo Shujitsu" Mean?

You often hear terms like 'Ryuhyo Shonichi' and 'Ryuhyo Setsugan Shonichi' in the news. Ever wondered what the difference is? Here’s a simple explanation!

● Ryuhyo Shonichi (First Day of Drift Ice)・・・The first day drift ice can be seen from land with the naked eye
● Ryuhyo Setsugan Shonichi (First Day of Shore-fast Ice)・・・The first day the coast is covered with drift ice, making it impossible for ships (excluding drift ice tour boats) to navigate
● Ryuhyo Shujitsu (Last Day of Drift Ice)・・・The last day drift ice is visible from the observation point

Areas to See Drift Ice and Recommended Spots to Enjoy It

You can see drift ice in areas along the eastern Okhotsk coast of Hokkaido, such as Wakkanai City, Mombetsu City, Abashiri City, Shari Town, and Rausu Town.

1 Mt. Tento Observatory & Okhotsk Ryu-hyo Museum (Abashiri City)

This facility features exhibits of real drift ice and showcases the creatures that live in the Sea of Okhotsk. A fantastical space is created with light and sound effects. There is also a theater where you can experience stunning 4K footage of the drift ice, the creatures living beneath it, and the magnificent nature with a great sense of realism. The rooftop offers panoramic views throughout the seasons.

2 Icebreaker Ship Garinko-go (Mombetsu City)

This icebreaker tour ship plows through the vast drift ice of the Sea of Okhotsk with its large drills. From the deck, you can enjoy the mystical sight of crushed ice rising up alongside the hull up close. The sound and vibration of the ice being crushed are truly powerful. A magical world awaits that can only be experienced by those on board, offering a different perspective from viewing the drift ice from land. In addition to regular cruises, they also offer wildlife watching cruises.

3 Cape Puyuni (Shari Town)

Famous as a spot for spectacular views and sunsets, Cape Puyuni offers a panoramic view of the Okhotsk coastline covered in drift ice and Utoro Port. You can see as far as the mountains of Akan-Mashu National Park, allowing you to enjoy both the drift ice and the majestic nature. It is a popular spot known for being one of the earliest places to see drift ice on the Sea of Okhotsk.

4 Ryuhyo Ice Boom / Ryugudai Observatory (Yubetsu Town)

Ryugudai Observatory is a prime spot where you can observe the drift ice so close you can almost touch it. The ice boom, built to prevent drift ice from entering Lake Saroma and damaging oyster and scallop farming facilities, makes the view of the drift ice even more captivating.

Please enjoy the best part of winter that can only be seen on the Sea of Okhotsk.
*Please note that it may not be possible to see the drift ice depending on the weather. Be sure to check the official websites for the latest information.