The word oiran comes from the Japanese phrase oira no tokoro no nēsan (おいらの所の姉さん) which translates into “my elder sister.” When written in kanji, the word consists of two characters, 花 meaning “flower”, and 魁 meaning “leader” or “first.” Technically, only the high-class prostitutes of Yoshiwara were called oiran, although the term is widely applied to all. ….. by Wiki