私わたし は 四よん十じゅっ歳さい です。watashi wa yonjussai desu.I am 40 years old.Breakdown of watashi wa yonjussai desu.私わたしwatashiIですdesuto beはwatopic particle四よん十じゅうyonjuu40〜歳さい〜saiyears of age (counter)Elon.io is an online learning platformWe have hundreds of Japanese lessons and thousands of exercises.Start learning Japanese nowNihon-shiki romanizationwatasi ha tyuugoku kara kimasitaHepburn romanizationwatashi wa chuugoku kara kimashita