noun
Formal term for a person who comes to visit a place, often used in tourism or event contexts.
今年の祭りには多くの来遊者が訪れた。
Many visitors came to this year's festival.
訪問者 is a general term for 'visitor', whereas 来遊者 emphasizes coming for leisure or sightseeing.
Compound of 来 (come) + 遊 (play, visit) + 者 (person). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'visitor'.