Commemorative Coins Seikan Tunnel Opening 500 Yen Cupro-nickel Coin
The 500-yen white copper commemorative coin marking the opening of the Seikan Tunnel was issued to commemorate the opening of the Seikan Tunnel—the world’s longest undersea tunnel—in March 1988.The obverse of the coin features waves and seagulls symbolizing the Seikan Tunnel and the Tsugaru Strait, while the reverse depicts a map of Hokkaido and Honshu.