English → Japanese
sister
(your own younger sister ) = いもうと ・妹
(someone else's older sister ) = おねえさん ・ お姉さん
(someone else's younger sister ) = いもうとさん ・ 妹さん
noun
Note that there are two sets of words for family members
noun
(your own older sister ) = あね ・ 姉 (your own younger sister ) = いもうと ・妹
(someone else's older sister ) = おねえさん ・ お姉さん
(someone else's younger sister ) = いもうとさん ・ 妹さん