上旬 (Joujun) is a Japanese noun meaning “first third of a month, first ten days of a month”.
Meanings
- nounfirst third of a month; first ten days of a month
Examples
７月の上旬は、海に行くのは早いかな？
I wonder if the first week or so of July is too early to go to the beach.
Sentences from Tatoeba (CC BY 2.0 FR).