 Complete the following phrase:  She was laid down at the shipyard of Osaka Tekkosho Sakurajima Kojo for the benefit of Nippon Suisan K.K. and launched in March 1920. In 1921, her port of registry was changed from Hiroshima to Shimonoseki; and in 1930, to Tobata. She worked as a fishing vessel until 15 September 1940 when she was requisitioned by the Imperial Japanese Navy. Her conversion to an auxiliary minesweeper was started on 25 September 1940 at the Mako Naval Base and completed on 15 November 1940. She was assigned to the Sasebo Guard Force until 1 September 1941 when she was assigned to the Southern Expeditionary Fleet organized to 