非常時|ひじょうじhijouji[2]nakadaka (mid-high)

1. nountime of emergency; (in an) emergency
   いかなる非常時ひじょうじにもホームズさんはいつも頼たよりになる。↗

   You can always count on Holmes in any emergency.

• Synonym有事ゆうじNeutralRefers to emergencies such as war or civil unrest, as in 「有事法制」; it leans military, while 「非常時」 covers any period of crisis, including disasters.
• Synonym急場きゅうばNeutralMeans a critical moment demanding some action, as in 「急場をしのぐ」; it stresses improvising a stopgap, not the crisis period itself.
• Synonymまさかの時まさかのときCasualColloquial set phrase for when the unexpected happens, used with a just-in-case nuance; 「非常時」 refers to crisis periods such as war or natural disaster.
• Synonym緊急時きんきゅうじNeutralMeans the time of an emergency, as in 「緊急時の連絡先」; close to 「非常時」, which leans more toward large-scale crises like war and natural disasters.
• Related危機ききNeutralMeans crisis, stressing danger to survival or existence; it names the critical situation rather than a period of time, unlike 「非常時」.
• RelatedエマージェンシーNeutralLoanword for an emergency; seen mostly on signs such as 「エマージェンシーコール」.
• Related緊急きんきゅうNeutralMeans urgency, stressing that something brooks no delay; it describes pressing need, not a whole crisis period like 「非常時」.
• Related非常ひじょうNeutralCovers emergencies in compounds like 「非常口」 and 「非常ベル」, and as 「非常に」 it simply means 'extremely'; 「非常時」 specifically means a crisis period.
• Related急変きゅうへんNeutralRefers to a sudden change, typically in illness, weather or attitude; it stresses abruptness of change, not a crisis period like 「非常時」.
• Related危急ききゅうNeutralMeans imminent danger, and can describe a patient turning critical; it stresses danger closing in, not a whole period of crisis.
• RelatedピンチCasualColloquial loanword for a pinch or tight spot; used mainly about individuals or matches, while 「非常時」 refers to crisis periods.
• RelatedクライシスNeutralLoanword for crisis, as in an economic crisis; it leans toward written prose, unlike 「非常時」, which covers the whole crisis period.
• Related焦眉しょうびWrittenWritten word for something pressing that demands immediate solution, used mostly in the phrase 「焦眉の急」; unlike 「非常時」 it names urgency, not a period.
• Related非常事態ひじょうじたいNeutralMeans a state of emergency, as in 「非常事態宣言」; it points to the situation itself, not the whole stretch of crisis time that 「非常時」 covers.
• Related緊急事態きんきゅうじたいNeutralDenotes an emergency situation requiring immediate action, as in 「緊急事態宣言」; unlike 「非常時」 it stresses urgency of response rather than the period.
• Related火急かきゅうWrittenWritten word for extreme urgency, stressing how pressing something is; unlike 「非常時」 it does not refer to a whole crisis period.
• Related変事へんじWrittenWritten word for an extraordinary calamity or untoward event; fairly rare, and it names the event itself rather than a crisis period.
• Antonym平時へいじNeutralAntonym: ordinary or peacetime, the opposite of a period of emergency; use it when contrasting normal conditions with 「非常時」.

Use 「非常時」 for a period of crisis such as war or natural disaster, as in 「非常時に備える」. For war-related emergencies say 「有事」; for a declared state of emergency, 「緊急事態」 or 「非常事態」; for everyday just-in-case moments, colloquial 「まさかの時」; for personal tight spots, 「ピンチ」. 「緊急時」 is a close match, though 「非常時」 leans toward large-scale crises, while 「危機」, 「緊急」 and 「火急」 stress urgency or danger rather than the period. The antonym is 「平時」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 国内こくないまたは世界せかいにおいて戦乱せんらんや天災てんさいで危機的ききてきな状況じょうきょうの場面ばめん。