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私の姉は医者です。
My older sister is a doctor.
an older sister; elder sister
彼女は三人姉妹の長女です。
She is the eldest of three sisters.
姉は私より五歳年上です。
My sister is five years older than me.
Used for one's own sister. For addressing someone else's sister politely, use 姉さん (anesan).
姉 (older sister) and 妹 (younger sister) are used regardless of the speaker's gender. For brothers, use 兄 (older brother) and 弟 (younger brother).
When referring to someone else's older sister, always use 姉さん (anesan) or the full title (e.g., 田中さんの姉). Using just 姉 alone can sound impolite.
From Old Japanese *ane₂, from Proto-Japonic *ana. Cognate with Ryukyuan languages (e.g., Okinawan あに 'older sister').
In Japanese family hierarchy, the term emphasizes age order. For addressing or referring to someone else's older sister, suffix -さん (e.g., 田中さんの姉) or use 姉さん (anesan).