 15 more sets, M01 to M15, were delivered from Kawasaki Heavy Industries to Tsuruga Depot between January and March 2011.16 two-car 521 series sets were transferred to the third-sector railway operating company Ainokaze Toyama Railway for use from 14 March 2015 when JR West handed over ownership of the sections of the Hokuriku Main Line in Toyama Prefecture running parallel to the new Hokuriku Shinkansen.Likewise, three two-car sets were transferred to the IR Ishikawa Railway, which took over control of the section of the Hokuriku Main Line in Ishikawa Prefecture from 14 March 2015.