Word確実かくじつkakujitsuMeaningcertain; reliablePart of speechna-adjectivePronunciationCourseHardcore JapaneseLessonRegistering a change of address at city hallUsages of kakujitsuこの 方法ほうほう は 確実かくじつ です。kono houhou wa kakujitsu desu.This method is reliable.