“〜ijou (wa)・〜kara ni wa”: Now That 〜, You Must [JLPT N1]

Content by NTJ Kuma · Nihongo to Japan editorial team · Updated July 27, 2026

「引き受けたからには必ずやり遂げる」 — now that you're in, live up to it.

「引き受けた以上は、最後まで責任を持つ」 — now that you've taken it on, you're responsible to the end

To express the responsibility of “now that ～, of course you must ～,” 「引き受けた以上は、途中で投げ出すわけにはいかない」 (now that I've taken it on, I can't abandon it partway) — 「〜以上（は）・〜からには」 = now that ～, since ～, you must／should (of course) ～, used to express “now that the first part holds／is decided, the second is a natural responsibility, duty, or resolve.” This guide covers attachment, the duty expressions the second half pairs with, and separating it from the reason-only 「のだから.」

Core: now that the first part holds, the second is a matter of course

「verb plain form／た-form ＋ 以上（は）／からには」 means “now that ～ (holds／is decided), you must／should (of course) ～”:

• 日本で働くからには、日本語を身につけるべきだ (since you'll work in Japan, you should master Japanese).
• 社会人である以上、時間は守らなければならない (now that you're a working adult, you must be punctual).
• 挑戦すると決めたからには、後悔はしない (now that I've decided to take it on, I won't regret it).

Feel: the first half is “an established, decided fact,” the second “the resulting natural responsibility, duty, resolve, or judgment.” It binds “now that A” to “then B is a matter of course,” the second half often pairing with 「べきだ・なければならない・当然だ・つもりだ」 — duty, resolve, matter-of-course. It corresponds to “now that ～, you must／should (of course／definitely) ～.”

How it attaches

Examples in use

• 約束したからには、必ず守るつもりだ。(Now that I've promised, I intend to keep it without fail.)
• 親である以上、子供を守る責任がある。(Now that you're a parent, you have a duty to protect your child.)
• 一度始めた以上は、途中でやめるべきではない。(Now that you've started, you shouldn't quit partway.)
• 代表として出るからには、恥ずかしい戦いはできない。(Since I'm competing as a representative, I can't put up an embarrassing fight.)
• 引き受けた以上、全力を尽くすのは当然だ。(Now that I've taken it on, going all out is a matter of course.)

⚠️ Common mistakes to avoid

① The core is ‘now that (the first part is established) → the second is a natural responsibility／resolve.' 「〜以上（は）・〜からには」 isn't a plain “because ～”; it has a strong “now that it's so, then of course (there's responsibility／one should／one resolves)” flavor. The first half is an “established, decided, holding” fact (引き受けた, 約束した, プロである), and the second is “the resulting natural responsibility, duty, resolve, or judgment”: やると決めたからには、途中でやめない (now that I've decided to do it, I won't quit partway — “decided” → “won't quit” is a matter of course). So it's often followed by 「べきだ・なければならない・当然だ・つもりだ.」 It corresponds to “now that ～, you must／should (of course) ～.” Test: to express “now that ～ (established), that ～ is a natural responsibility／resolve” → 以上（は）／からには.

② Attach a verb plain form／た-form ＋ 以上（は）／からには; nouns use 「である以上.」 Get the attachment right. Precedes a verb plain form or た-form (やる以上は・やった以上は・約束したからには). Nouns use 「である ＋ 以上」 (学生である以上・プロである以上), not directly 「noun ＋ 以上」 (× プロ以上は). 「からには」 also takes a verb plain form／た-form (やるからには・やったからには). Mnemonic: verb plain form／た-form ＋ 以上（は）／からには; noun である ＋ 以上.

③ Division of labor with 「のだから (reason only)／からこそ (precisely because).」 These all relate to “cause／reason,” but differ in feel. 「以上（は）／からには」 = now that ～, you must (a natural responsibility／resolve): with the weight of “now that it's so, then one should／must ～,” followed by duty／resolve: 約束したからには守る (now that I've promised, I'll keep it). 「のだから」 = because ～, so (a plain statement of reason): it just plainly explains a reason, without the “now that → natural responsibility” weight: 子供なのだから、失敗しても仕方がない (because he's a child, failing can't be helped). 「からこそ」 = precisely because ～ (stressing ‘it's exactly this reason'): 君だからこそ、この仕事を任せる (precisely because it's you, I entrust this job). Difference: 「以上は／からには」 = now that → a natural responsibility／resolve; 「のだから」 = a plain because ～ so; 「からこそ」 = precisely because ～. Test: to say “now that ～, one should／must／resolves to ～” → 以上は／からには; a plain “because ～ so” → のだから; to stress “precisely because ～” → からこそ.

🔄 Compare with similar forms: 以上（は）／からには／のだから／からこそ

💡 The one thing to remember

「〜以上（は）・〜からには」 = now that ～, you must／should (of course) ～ — three points: ① the core is “now that (the first part is established) → the second is a natural responsibility／duty／resolve” — often followed by べきだ／なければならない／つもりだ (約束したからには守る); ② attach a verb plain form／た-form (nouns use 「である以上」); ③ division of labor with 「のだから (reason only)／からこそ (precisely because)」 — 以上は／からには is “now that → a natural responsibility.” This pattern has real “follow through on your word, shoulder responsibility” force — “now that I've taken it on, I'll be responsible to the end,” “now that I've decided, I won't regret it.” To weightily express that “now that it's so, of course I must ～” resolve and sense of responsibility, 「〜以上は／からには」 is spot-on (からには carries more subjective resolve, 以上は more objective formality).

❓ Quick FAQ

Q: What's the difference between 「以上は」 and 「からには」? Interchangeable?

Nearly the same (both “now that ～”), mostly interchangeable, the difference is the feel of ‘objective vs subjective resolve' and register. Both express “now that the first part holds／is decided, the second is a natural responsibility, duty, or resolve,” interchangeable in most cases: やる以上は全力を尽くす ≒ やるからには全力を尽くす (now that I'll do it, I'll go all out). Subtle difference: 「〜以上（は）」 = now that ～ (leans objective, formal, reasoning): it's more objective, formal, with a “given this stance／fact, it stands to reason” flavor, often for stating objective responsibilities, duties: 教師である以上、生徒に対して責任がある (now that you're a teacher, you have a responsibility to students — an objective stance and duty), 契約した以上、履行する義務がある (now that you've contracted, you have a duty to perform). It leans “(objectively) now that it's so, it stands to reason ～.” 「〜からには」 = now that ～ (leans subjective, with the speaker's resolve／drive): it's more subjective, feeling-laden, often carrying the speaker's “now that I'll do it, I'm resolved to ～” resolve, drive: やるからには、絶対に勝つ (now that I'll do it, I'll definitely win — subjective resolve), 引き受けたからには、最後までやり抜く (now that I've taken it on, I'll see it through — with drive). It leans “(subjectively) now that I'll ～, I (resolve to) ～.” Difference: 「以上は」 leans objective, formal (stating a responsibility／duty that stands to reason); 「からには」 leans subjective, with resolve (expressing resolute drive). Test: to objectively, formally say “now that ～, it stands to reason ～ (responsibility／duty)” → 以上は; to subjectively, resolutely say “now that I'll ～, I (definitely／to the end) ～” → からには. The two are often interchangeable, but 「からには」's resolve and 「以上は」's objectivity each have their emphasis.

Q: What's the difference between 「約束した以上」 and 「約束したのだから」? (both give a reason)

The difference is ‘now that → a natural responsibility／resolve' vs ‘a plain statement of reason.' 「〜以上（は）」 = now that ～ (the first part established → a natural responsibility／duty／resolve): it treats 「約束した (an established fact)」 as the premise for “therefore, of course, one must take responsibility,” with the weight of “now that it's so, one should／must ～,” the second half mostly duty／resolve: 約束した以上、必ず守るべきだ (now that I've promised, I definitely should keep it — “promised” → “should keep” is a natural responsibility), 代表になった以上、期待に応えなければならない (now that I've become the representative, I must meet expectations). It stresses “now that ～, a responsibility／duty naturally arises.” 「〜のだから」 = because ～, so (a plain statement of reason, flatter): it just plainly explains a reason “because ～, so ～,” without the “now that → natural responsibility” weight, the second half any result (not limited to duty): 約束したのだから、彼は来るはずだ (because he promised, he should come — a plain inference, not “he must take responsibility”), 子供なのだから、しかたがない (because he's a child, it can't be helped — a plain reason). Difference: 「以上は」 = now that ～, (therefore) one must of course (be responsible／perform a duty); 「のだから」 = because ～, so ～ (a plain cause／reason). Test: to stress “now that ～, one should／must／resolves to shoulder ～” (with responsibility／duty weight) → 以上は; to just plainly say “because ～ so ～” (state a reason) → のだから. E.g. 「プロである以上、言い訳は許されない (now that you're a pro, excuses aren't allowed — responsibility)」 uses 以上; 「疲れているのだから、休んだほうがいい (because you're tired, you'd better rest — a plain reason)」 uses のだから. One carries “a natural responsibility,” one is just “because so.”

🖊️ Practice Questions (5)

Q1. 「プロである___、結果を出さなければならない。」(now that you're a professional)

(A) 以上　(B) ところ　(C) ばかり　(D) どころ

Q2. What tends to come in the second clause of 「以上(は)」?

(A) べきだ／なければならない／つもりだ

(B) かもしれない

(C) だろうか

(D) たい (wish only)

Q3. What does 「引き受けた以上やり遂げる」 mean?

(A) Now that I've taken it on, I'll see it through (responsibility)

(B) I took it on but won't do it

(C) I didn't take it on

(D) I want to give up

Q4. When attaching to a noun?

(A) noun + である以上

(B) noun + だ以上

(C) noun + な以上

(D) noun + を以上

Q5. Which usage is correct?

(A) 約束したからには守る。　(B) 約束するからには(過去が自然)守った。

(C) 学生だ以上。　(D) 引き受けて以上。

Answer Explanations

1. (A) 以上 ── Now that you're a professional.

2. (A) ── The second clause is mostly obligation/resolve/advice.

3. (A) ── Now that I've taken it on, I'll see it through.

4. (A) ── noun + である以上.

5. (A) ── 「約束したからには守る」 is correct.