Meaning & usage
以上は expresses that now that a fact is established, a certain obligation, decision, or expected action follows. It attaches to the plain form of verbs and adjectives, to nouns with である, and は is often optional. The second clause usually states a duty, intention, or strong recommendation, like 守らなければいけない or 続けよう, and cannot state a mere guess about the past.
Example sentences 7
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始めた以上は、最後まで続けよう。
Since we started it, let's keep going until the end.
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約束した以上は、必ず守らなければいけない。
Now that you made a promise, you have to keep it.
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日本に住む以上は、日本語を勉強しよう。
Since you live in Japan, let's study Japanese.
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参加する以上は、真剣にやります。
Since I'm taking part, I'll do it seriously.
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借りた以上は、きちんと返してください。
Since you borrowed it, please return it properly.
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選んだ以上は、後悔しないつもりだ。
Now that I've chosen it, I don't intend to regret it.
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社員である以上は、規則を守るべきだ。
Since you are an employee, you should follow the rules.
In past JLPT papers
This came up in 7 past exam questions.
And 3 more tests.