The Seikan Tunnel passes 100 meters below the seabed directly beneath the Cape.
The Tsugaru Strait is a major international shipping lane for vessels traveling between the Sea of Japan and the Pacific.
Tappizaki Lighthouse is categorized as a 'Class A' lighthouse due to its critical role in maritime navigation.
The name 'Tappi' is derived from the Ainu word 'tap-i', meaning 'the foot of a mountain'.
It is the only place in Japan where a national road, Route 339, contains a pedestrian-only staircase segment.
Cape Tappi serves as the northernmost point of the Tsugaru Peninsula, projecting into the Tsugaru Strait. The site features the Tappizaki Lighthouse, which has marked the turbulent waters since 1932. Visitors can observe the separation between the Sea of Japan and the Pacific Ocean across the strait. On clear days, the coastline of Hokkaido's Matsumae Peninsula is visible from the observation deck. The area includes the Seikan Tunnel Museum, detailing the engineering history of the world's longest undersea railway tunnel located directly beneath the cape. Local dining options focus on fresh seafood caught in the Tsugaru Strait, particularly squid and sea urchin. Strong coastal winds are a defining climatic feature of this cape throughout the year. The location is a designated part of the Tsugaru Quasi-National Park.
The staircase of the 'staircase national road' (Route 339) with the lighthouse in the background.
Bring a windproof jacket even in summer due to constant high-velocity coastal winds.
Utilize the designated observation platform for the clearest views toward the Hokkaido coast.
Carry binoculars to spot international cargo ships navigating the narrow strait.
Do not attempt to walk along the steep cliff edges, as the terrain is unstable and high winds can cause accidental falls.
The Seikan Tunnel Museum and related exhibits typically close during winter months due to heavy snowfall.
