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180m in length, 8m in width, the 4-m-deep canal waterway which shaved the base rock of Toryu-nada and were completed at last by base rock excavating work in Meiji 5. It became possible to pass to the lower stream, without having connected the water transport of the upstream section and downstream portion which have been obstructed by the base rock of Toryu-nada until now, and taking down a cargo by this. |