浦賀船渠
"Isuzu" was laid down on 10 August 1920, launched on 29 October 1921 and completed at the Uraga Dock Company on 15 August 1923. From August to December 1928, she was under the command of Captain Isoroku Yamamoto, and from November 1929 to December 1930 under the command of Captain Shirō Takasu.