The original 3000 series was introduced on 3 February 2005 on the newly opened Nanakuma Line between and . Unlike the
1000 series and
2000 series trains operated on the
Airport Line and
Hakozaki Line, the 3000 series trains are standard gauge () and use
linear motor propulsion.
3000A series Four new sets, designated as 3000A series, were ordered in 2021 in anticipation for an increase in service needed when the Nanakuma Line extension from to would open on 27 March 2023. Internally, the sets' intermediate cars feature sets of "universal design" priority seats that are high, a increase over other seats. The Fukuoka City Transportation Bureau reports that the heightened seats are designed to be easier to sit on and stand up from. and the 3000A series sets made their first trips in revenue service in February 2022. Four sets were ordered in 2024 to allow for an increase in frequency from 17 to 21 trains per hour. File:Fukuoka Series3000A-3119 Inside.jpg|3000A series interior File:Fukuoka Series3000A-3219 Priority-seat.jpg|3000A series priority seating. The heightened seats are distinguished by their yellow colour. ==References==