Hall & Co., Aberdeen, Scotland, and was turned over to the Domain in February 1870 as the Un'yō Maru. On July 25, 1871, she was transferred to the Meiji government and assigned to the newly formed Imperial Japanese Navy, as the Un'yō .
Hall & Co., Aberdeen, Scotland, was incorporated into the Domain in February 1870 as the Un'yō Maru. On July 25, 1871, it was transferred to the Meiji government and assigned to the Imperial Japanese Navy under the name Un'yō.