一いち旬じゅん

noun

ten days; a period of ten days

Used to refer to a ten-day period, often in contexts like weather forecasts or traditional time divisions. Not an everyday word for 'ten days' (十日間 is more common).

• 天てん気き予よ報ほうでは、向むこう一いち旬じゅんは雨あめが続つづくと言いっていた。