How to say "One" in Japanese

When translating "one" into Japanese, you must choose carefully between 一 and 一夜. In Japanese, 一 (いち (ichi)) is typically associated with "one" (Syllabus Level: N5) and represents 数を数えるときに使います。ひとつ、一人、一日など、他の言葉と組み合わせて使われることも多いです。/ Used for counting. Often combined with other words like 'hitotsu'. On the other hand, 一夜 (いちや (ichiya)) maps to "one night; all night long" (Syllabus Level: N2) and represents Refers to a single night, often implying something happened or was completed during that night, or something that lasts for one night. Can sometimes imply a sudden or dramatic change, similar to 'overnight'.. A literal translation of "one" can often sound unnatural to native Japanese speakers if mixed up!