Tsugaru Strait, Japan

Tsugaru Strait is a vital waterway between Japan’s Honshu and Hokkaido islands.

A view of the city of Hakodate, Japan, across the Tsugaru Strait, with a prominent red lighthouse on a breakwater and mountains on the horizon under a dramatic, cloudy sky.

Overview

Tsugaru Strait, Japan

The Tsugaru Strait is a pivotal narrow waterway located in northern Japan, separating the main island of Honshu from the northern island of Hokkaido. This historically and geographically significant strait connects the Sea of Japan to the west with the Pacific Ocean to the east. While not a cruise port for disembarkation, sailing through the Tsugaru Strait offers a unique opportunity to appreciate Japan's diverse landscapes, its maritime heritage, and engineering marvels.

For centuries, this strait has been a critical maritime route, and today, it's most famous for being the location of the Seikan Tunnel, the world's longest undersea railway tunnel, which dramatically changed travel between Japan's two largest islands. A transit through the Tsugaru Strait provides passengers with picturesque views of Japan's rugged coastlines, the chance to reflect on its rich history, and an understanding of the powerful natural forces that have shaped this fascinating region.

Top Things to Do in Tsugaru Strait, Japan

Witness the Scenery of Honshu and Hokkaido Coastlines

As your ship traverses the strait, take in the dramatic coastal scenery of both Honshu (Aomori Prefecture's Tsugaru Peninsula) and Hokkaido (Matsumae Peninsula). You'll see rugged cliffs, forested hills, and the subtle shifts in landscape that mark the northern tip of Honshu and the southern edge of Hokkaido.

Tip: Head to the ship's open decks or a panoramic lounge for the best views. Bring binoculars to spot details on shore, such as lighthouses or small fishing villages.

Reflect on the Seikan Tunnel – an Engineering Marvel

Consider the incredible feat of engineering that lies beneath the waters you're sailing over: the Seikan Tunnel. While you won't see it, knowing you're passing above the world's longest undersea railway tunnel (at 53.85 km long and reaching 240 meters below sea level) adds a profound layer to your journey.

Tip: Look for informational plaques or listen to onboard commentary about the tunnel's construction and significance. If your cruise visits Aomori, the Seikan Tunnel Memorial Museum offers direct access to a portion of the tunnel.

Observe Maritime Traffic and Fishing Boats

The Tsugaru Strait is an active shipping lane. Observe the various vessels navigating the waters, including cargo ships, fishing boats (as the strait is known for rich fishing grounds, particularly for tuna and squid), and the large passenger and car ferries that provide vital connections between Honshu and Hokkaido.

Tip: Keep an eye out for the distinct designs of Japanese fishing vessels and the powerful currents that can be present in the strait.

Feel the Connection to Japanese History and Culture

The Tsugaru Strait holds significant cultural importance in Japan, famously immortalized in the popular enka song "Tsugaru Kaikyo Fuyugeshiki" (The Winter Scenery of the Tsugaru Strait). As you sail, you're crossing a body of water that has inspired artists and been a crucial passage for people for centuries.

Tip: If you have Wi-Fi, listen to the famous song to enhance the atmosphere. Reflect on the historical journeys of traders, settlers, and even refugees who crossed these waters.

Spot Wildlife (Especially Seabirds)

While large marine mammals might be elusive, the strait is an active environment for various seabirds. Keep an eye out for species diving for fish or gliding on the strong currents. If you're lucky, you might even spot dolphins accompanying the ship.

Tip: A keen eye and binoculars will help you identify different bird species. Onboard naturalists, if available, can point out local fauna.

Experience the "Blakiston's Line" Divide

The Tsugaru Strait is recognized by scientists as "Blakiston's Line," a significant zoogeographical boundary. This means that animal species found on Hokkaido to the north are often distinct from those found on Honshu to the south. Appreciating this invisible line adds an interesting scientific dimension to your scenic passage.

Tip: Consider researching some of the unique flora and fauna of Hokkaido and Honshu before your trip to better understand this ecological divide.

Overview