[4] The prototype set, S1, was delivered in May 1992,[2] and entered revenue service on 19 September 1992.

[5] On 8 August 1992, set 8001 achieved a speed of 160 km/h (99 mph) in a special test run.

[3] The subsequent fleet of full-production sets entered service from 18 March 1993.

The sets will receive a new livery based on that of the newer 8600 series, as well as wheelchair spaces, power outlets, reupholstered seats, updated traction equipment, and Western-style toilets.

[10] The entire fleet is planned to be refurbished by 2027[1] at a pace of two to three sets per year.