Kyūjitai form of 私鉄 (“private railway”)

a female given name

close friend, bosom buddy / crony, chum

Kyūjitai form of 鉄 (“iron”)

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object

prostitute

(chiefly women's speech) first person singular pronoun: I, me

private; mine

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness