How to say "Necessity" in Japanese

When translating "necessity" into Japanese, you must choose carefully between 必要 and 保全の必要性. In Japanese, 必要 (ひつよう (hitsuyou)) is typically associated with "necessity, need, essential" (Syllabus Level: N4) and represents A noun or な-adjective indicating something is required or essential. Often used with です or がある.. On the other hand, 保全の必要性 (ほぜんのひつようせい (hozen no hitsuyousei)) maps to "necessity of preservation" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "necessity" can often sound unnatural to native Japanese speakers if mixed up!