変かえるkaeruto changeUsages of kaeru段階だんかいごと に 対策たいさく を 変かえること が 大切たいせつ です。dankaigoto ni taisaku wo kaerukoto ga taisetu desu.It is important to change measures at each stage.Elon.io is an online learning platformWe have hundreds of Japanese lessons and thousands of exercises.Start learning Japanese now