Translation guide
The English word 'vital' has several distinct meanings. This guide helps learners choose the right Japanese expression depending on whether they mean 'essential/crucial', 'life-related', 'energetic', or 'fatal'.
Expressing that something is absolutely necessary or of the highest importance.
The most common and direct translation for 'vital' meaning 'indispensable'. Used in both spoken and written Japanese.
水は生命にとって不可欠です。
Water is vital for life.
このプロジェクトには彼の協力が不可欠だ。
His cooperation is vital for this project.
Means 'mandatory' or 'required'. Often used for rules, qualifications, or conditions. Slightly more formal than 不可欠.
この仕事には経験が必須です。
Experience is vital for this job.
Literally 'extremely important'. A natural phrase when you want to emphasize the degree of importance.
この決定は極めて重要だ。
This decision is vital.
Means 'crucial' or 'key', often used in the phrase 肝心なのは (the vital thing is...). Slightly more colloquial.
肝心なのは、諦めないことだ。
The vital thing is not to give up.
Describing something connected with life, living organisms, or life force.
The adjective form meaning 'of life' or 'life-related'. Used in phrases like 'vital signs' or 'vital functions'.
医者は患者の生命の兆候を調べた。
The doctor checked the patient's vital signs.
Means 'life support' or 'life-sustaining'. Used in medical or technical contexts.
生命維持装置が彼の命を支えている。
The vital life-support equipment is keeping him alive.
Means 'vitality' or 'life force'. Used when 'vital' refers to energy or vigor.
Describing a person or thing that is lively, dynamic, or vigorous.
Means 'active', 'lively', or 'vigorous'. Commonly used for people, discussions, or activities.
彼女はとても活発な子供だ。
She is a very vital child.
Means 'energetic' or 'vigorous', emphasizing effort and drive. Often used for work or action.
Means 'lively' or 'vivid', often describing expressions, eyes, or atmosphere. More poetic.
彼女の生き生きとした表情が印象的だ。
Her vital expression is impressive.
Describing something that causes death or is extremely dangerous.
Means 'fatal' or 'deadly'. Used for injuries, mistakes, or flaws that lead to failure or death.
彼は致命的な傷を負った。
He received a vital wound.
そのミスは致命的だった。
That mistake was vital (fatal).
Literally 'life-taking'. A more dramatic or colloquial way to say 'fatal'.
Do not translate 'vital' as バイタル (baitaru) unless you are referring to 'vital signs' in a medical context. The loanword バイタル is only used in the compound バイタルサイン (vital signs) and is not a general adjective.
不可欠 (fukaketsu) means 'indispensable' and is used for things that are absolutely necessary. 必須 (hissu) means 'required' or 'mandatory' and is often used for conditions or qualifications. For example, 'Water is vital' uses 不可欠, while 'A license is vital' uses 必須.
心臓は生命維持に不可欠な臓器です。
The heart is a vital organ.
Combining 生命維持 (life support) and 不可欠 (indispensable) to convey 'vital organ'.
彼は活力に満ちている。
He is full of vital energy.
He is active in a vital way.
その油断が命取りになった。
That carelessness proved vital (fatal).