Translation guide
Expresses obligation or necessity, often with a sense of being forced by circumstances, rules, or moral duty. Japanese uses various conditional, negative, and set phrases to convey this.
Express a strong obligation or necessity, often due to rules, circumstances, or personal duty.
Standard pattern for 'must' or 'have to'. Literally 'if (I) don't do V, it won't do'. Used in both spoken and written Japanese.
明日までにレポートを出さなければならない。
I have to submit the report by tomorrow.
Very common in spoken Japanese. Slightly more conversational than なければならない.
もう行かなくてはいけない。
I have to go now.
Casual spoken form of なくてはいけない. Often shortened to ないと in casual speech.
早く起きないといけない。
I have to wake up early.
Similar to なければならない but slightly softer. Common in speech.
宿題をしなければいけない。
I have to do my homework.
Emphasize that the obligation arises from external circumstances, leaving no alternative.
Formal/written expression meaning 'cannot help but do' or 'have no choice but to'. Used when forced by situation.
悪天候のため、試合は中止せざるを得なかった。
Due to bad weather, we were obliged to cancel the game.
Means 'cannot avoid doing' due to social obligation or common sense. Stronger than なければならない.
上司に頼まれたので、やらないわけにはいかない。
Since my boss asked me, I'm obliged to do it.
Expresses that there is no other choice but to do something. More resigned than なければならない.
バスがないので、歩くしかない。
There's no bus, so we have no choice but to walk.
Express a sense of duty or moral obligation, often softer than 'must'.
Indicates that something should be done based on moral duty, common sense, or proper conduct. Stronger than ほうがいい.
約束は守るべきだ。
You should keep your promises.
Used for general social or moral expectations, often in a lecturing tone. 'One ought to...'
年上には敬語を使うものだ。
One ought to use polite language with elders.
Express obligation stemming from a sense of gratitude or indebtedness to someone.
Means 'to be indebted to someone' or 'to owe a debt of gratitude'. Often used in formal contexts.
彼には大変恩義がある。
I am deeply obliged to him.
Literally 'to have a debt', but often used metaphorically for feeling obliged due to a favor received.
彼に借りがあるから、断れない。
I can't refuse because I'm obliged to him.
なければならない expresses a strong, often unavoidable obligation (must). べきだ expresses a moral or logical 'should', often based on personal judgment or social norms. べきだ is softer and can sound preachy if overused.
税金を払わなければならない。
You must pay taxes.
もっと勉強するべきだ。
You should study more.
Direct translations like '義務づけられている' are overly formal and rarely used in daily conversation. Use the patterns above for natural Japanese.