Translation guide
Expresses doing something one additional time, or again. The most common and neutral way is もう一度 (mō ichido). Other options vary by formality, context, and nuance.
Please say it once more.
I'll try once more.
Casual equivalent of もう一度. 回 is the counter for times/occurrences, so it feels slightly more concrete or informal.
Let's do it once more!
Formal or written equivalent of 'once more'. Often used in business or official contexts.
Please check once more.
Slangy, emphatic 'once more', often used in entertainment or when cheering someone on. Literally 'one more block/round'.
Once more! (encore!)
The speaker refers to something happening again, not necessarily limited to one additional time.
再び戦争が起こった。
War broke out once more.