noun
integrated education; continuous school system
Refers to a system where students can progress from elementary through secondary (and sometimes tertiary) levels without entrance exams, often within the same institution or affiliated schools.
この学校は一貫教育を採用しているので、中学から高校へは無試験で進学できます。
This school adopts an integrated education system, so students can advance from junior high to senior high without entrance exams.
Compound of 一貫 (いっかん, 'consistent, through') and 教育 (きょういく, 'education'). The term describes a seamless educational pathway.