Hakodate Seikan Liaison Ship Memorial Museum Mashu-maru
The Hakodate Seikan Liaison Ship Memorial Museum Mashu Maru was built on the hull of the Tsugaru Maru (2nd generation), a liaison ship that served as the Seikan Liaison Ship and was known as the "bullet train" of the sea. After the ship ended its service in 1988, it was converted into an exhibition ship and opened to the public as a memorial ship, and later reopened in 2003 as the current Hakodate Seiko-Hakodate Liaison Ship Memorial Museum Mashu Maru.
You can learn about the ferry's structure and history through panels and videos. I really recommend this place! 🤣