快かい急きゅうかいきゅうじ字FuriganaMeanings1nounrapid express (train)abbreviationAbbreviation of 快速急行, a type of express train service in Japan. Used primarily in railway announcements, timetables, and signage.See also: 快速急行次つぎの快かい急きゅうは、新しん宿じゅくに停てい車しゃします。