Word四よん階かいyonkaiMeaningfourth floorPart of speechnounPronunciationCourseJapaneseLessonThe floor counter 階Breakdown of yonkai四よんyonfour〜階かい〜kaifloor counterElon.io is an online learning platformWe have hundreds of Japanese lessons and thousands of exercises.Start learning Japanese nowYour questions are stored by us to improve Elon.io