one's sister regardless of age difference / one's lover or sweetheart who is the subject of marriage or is already married / (archaic, said from a female speaker) a close female companion

one's own younger sister / the wife of one's younger brother; one's sister-in-law / a younger female / (archaic, said from a male speaker) one's sister regardless of age difference

(rare) Same as いもうと (imōto) above

a placename

Same as いもうと (imōto) above

a female given name

younger sister

椿, 山茶, 海石榴: the Japanese camellia, Camellia japonica

a female given name / 椿, 山茶: a surname / 椿, 山茶: a female given name / 椿: a place name

津波木, 津葉木, 鍔木, 椿木: a surname / 乙姫, 月羽希, 椿希, 椿樹, 椿生: a female given name / 椿姫, 椿有, 翼希, 翼樹, 翼姫: a female given name / 翼生: a male given name