こっち は 妹いもうと だ。kotchi wa imouto da.This is my younger sister.Breakdown of kotchi wa imouto da.はwatopic particle妹いもうと(さん)imouto(san)younger sisterだdato beこっちkotchithis person; this way; this (one)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