究極英単語！英検突破編

究極英単語！英検突破編 is the ultimate free Chrome extension designed to help you efficiently prepare for the Eiken English proficiency exam. Covering 4800 essential words required for all key Eiken levels—from 5th grade to 2nd grade—it offers a comprehensive vocabulary training system loved by over a million users.

The extension incorporates spaced repetition based on forgetting curve theory to optimize your review timing, ensuring that you thoroughly master each word and idiom frequently appearing in past exams. Features include multiple question formats, easy tap-based learning, seamless word look-ups, audio playback for pronunciation, detailed learning progress tracking, and cross-device synchronization. Whether you're studying on the go or at home, this tool supports consistent progress toward passing your Eiken exam with confidence.