User:XtraJovial/sandbox10

Variants

 * 521-0 series: 2-car sets operated by JR West, Ainokaze Toyama Railway, and Hapi-Line Fukui on Hokuriku Main Line, Obama Line services
 * 521-1000 series: 2-car sets operated by Ainokaze Toyama Railway
 * 521-100 series: 2-car sets operated by JR West and IR Ishikawa Railway on Nanao Line and IR Ishikawa Railway Line services

521-0 series
The first five sets, E01 to E05, were built by Kawasaki Heavy Industries and Kinki Sharyo, and were delivered to Fukui depot between September and October 2006. These entered revenue service from 30 November 2006. The fleet was reallocated to Tsuruga Depot from 1 June 2010.

Ten more sets, G01 to G10, built by Kinki Sharyo, were delivered to Kanazawa depot between October 2009 and March 2010, entering revenue service from 13 March 2010. A further five sets, G11 to G15, were delivered from Kawasaki Heavy Industries in December 2010 and January 2011. Fifteen more sets, M01 to M15, were delivered from Kawasaki Heavy Industries to Tsuruga Depot between January and March 2011. These sets were reassigned to Kanazawa depot from 2014.

Nineteen 3rd-batch two-car sets (J01 to J19) were delivered to Tsuruga Depot in fiscal 2013. The third-batch sets have cab ends based on the JR West 225 series EMUs, with improved crash resistance, and use LED lighting for interior lighting. These sets entered revenue service in spring 2014. A further two sets, J20 and J21, were delivered in 2015, but they were transferred to IR Ishikawa Railway shortly after their entry into service.

Two 2-car sets, J22 and J23, were delivered in 2021. These sets feature full-colour LED destination displays.

Hapi-Line Fukui
Sixteen sets were transferred to the third-sector railway operator Hapi-Line Fukui, which took over operations on the Hokuriku Main Line between Tsuruga and Daishoji from 16 March 2024.

521-100 series
The 521-100 series (521系100番台) was announced by JR West in September 2019 as a successor to the 413 and 415 series sets used on the Nanao Line. Fifteen 2-car sets (U01–U15) were built between 2019 and 2020 by Kinki Sharyo, with the first three sets (U01–U03) being delivered in December 2019. Three additional sets for IR Ishikawa Railway (IR06–IR08) were delivered on 3 December 2020.

Unlike older JR West 521 series sets, the 521-100 series sets feature red waistline striping, inspired by Wajima-nuri lacquerware and matching the body colour of the older 413 and 415 series sets. Internally, the 521-100 series sets use LED lighting throughout.

The 521-100 series sets entered revenue service on 3 October 2020.