How to say "One" in Japanese

When translating "one" into Japanese, you must choose carefully between 逐一 and 一気に. In Japanese, 逐一 (ちくいち (chikuichi)) is typically associated with "one by one, in detail, item by item" (Syllabus Level: N2) and represents To do or report things individually, sequentially, and in full detail. It emphasizes meticulousness and thoroughness. Often used with verbs like 報告する. On the other hand, 一気に (いっきに (ikkini)) maps to "in one go" (Syllabus Level: B2) and represents Essential structural term in CEFR B2 vocabulary syllabus.. A literal translation of "one" can often sound unnatural to native Japanese speakers if mixed up!