regional express train
A limited express train that operates within a specific region or section, often with fewer stops than a regular express but not as fast as a full limited express.
This regional express stops only at major stations within the prefecture.
If you take the regional express, you'll arrive 30 minutes earlier than by local train.
特急 is a general limited express, often covering longer distances, while 区間特急 is a limited express that runs only within a certain section or region.
快速 is a rapid service with fewer stops than local trains, but 区間特急 is a type of limited express, usually faster and with more comfortable seating.
Compound of 区間 (section, zone) and 特急 (limited express), literally 'section limited express'.