Definition of しょちょう
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(n) first menstruation
初潮は13歳の時でした。
I had my first period when I was 13 years old.
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(n) chief; head (of an office, of a laboratory)
所長が出かけている間、事務所の責任者は誰になるのですか。
Who is in charge of the office while the boss is away?
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(n) chief (of police); head (of office)
彼は警察署長です。
He is the chief of a police station.