必須
Something that is absolutely necessary or required. It cannot be omitted or avoided.
Examples
3 of 5パスポートは海外旅行に必須のアイテムだ。
A passport is an essential item for overseas travel.
この科目は卒業のために必須です。
This subject is mandatory for graduation.
必須アミノ酸を摂取する。
Consume essential amino acids.
Word Family
Memory Tip
Hi (inevitably) + Su (necessary) = Inevitably necessary.
Quick Quiz
このアプリを使うには、会員登録が( )です。
Correct!
The correct answer is: 必須
Examples
パスポートは海外旅行に必須のアイテムだ。
everydayA passport is an essential item for overseas travel.
この科目は卒業のために必須です。
formalThis subject is mandatory for graduation.
必須アミノ酸を摂取する。
academicConsume essential amino acids.
登録にはメールアドレスが必須となります。
businessAn email address is required for registration.
それは必須条件ではないけれど、あった方がいい。
informalIt's not a mandatory condition, but it's better to have it.
Word Family
Common Collocations
Common Phrases
必須とされる
to be considered essential
必須ではない
not mandatory
〜が必須になる
...becomes a must
Often Confused With
Hisshuu is specifically for school curriculum/courses; Hissu is general necessity.
Usage Notes
Commonly seen on web forms (required fields) and job descriptions.
Common Mistakes
Sometimes written as 必すご (wrong kanji/okurigana).
Memory Tip
Hi (inevitably) + Su (necessary) = Inevitably necessary.
Word Origin
Hi (always/without fail) and Su (to need).
Grammar Patterns
Quick Quiz
このアプリを使うには、会員登録が( )です。
Correct!
The correct answer is: 必須
Related Vocabulary
More general words
不測
B2An event or situation that is unexpected or unforeseen. It is often used in the context of preparing for emergencies.
障害
B2An obstacle, barrier, or impediment that hinders progress, action, or function.
加味
B2To add an element or factor into consideration when making a judgment or calculation. Literally 'to add flavor'.
一致
B2A state in which two or more things are the same, or people reach a common agreement.
推察
B2To guess or infer someone's feelings, the background of a situation, or an unseen fact based on available evidence or circumstances. It often involves empathy or logical deduction.
加速
B2To increase speed or to cause a process or trend to happen faster. It can refer to physical speed or the rate of social/economic change.
延長
B1To make something last longer in time or space. It is often used for deadlines, stays, or lengths of time.
相談
B1The action of seeking advice or discussing a matter with someone to reach a decision or get help.
興味
B1The feeling of wanting to know or learn about something or someone; a quality that excites curiosity.
締切
B1The latest time or date by which something should be completed or submitted.
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