The locks were designated as a Tangible Cultural Property by the Japanese government in 2005.
The mechanism functions by manually controlling the sluice gates to balance water pressure, a process rarely seen in modern automated canals.
It was designed specifically to facilitate the movement of cargo ships between the canal and the Jinzu River basin.
The lock system underwent extensive restoration in the early 2000s to restore its functional capacity for tourist vessels.
The canal's water level is regulated to accommodate the height difference between the Fugan Canal and the terminal sections of the waterway.
Nakajima Locks is a restored historical canal lock system located on the Fugan Canal in Toyama City. Originally constructed in 1935 as part of the inland waterway network to connect the city center with Toyama Bay, the site preserves the original operational mechanics used for cargo transport. It features a lock chamber that allows watercraft to transition between different water levels, a process still demonstrated for visitors today. The surrounding park area provides pathways along the canal, integrating industrial heritage with modern recreational space. The site serves as a vital node in the Fugan Canal Kansui Park corridor. Educational displays at the site explain the technical engineering required to manage the water levels of the canal during the early 20th century.
From the pedestrian bridge directly overlooking the lock chamber for a clear view of the gate mechanics.
Check the local canal operator's schedule to witness the lock cycle in person.
Walk the full length of the canal path toward Kansui Park to see the transition of the landscape.
Bring binoculars if visiting during migratory bird seasons, as the canal basin attracts various waterfowls.
Do not attempt to operate or touch the mechanical control handles, as they are part of a protected historical system.
Operations are suspended during the winter months due to cold temperatures and ice; tours involving the lock transition are seasonal.
