study tour; guided visit; field trip
A visit to a facility, institution, or site for the purpose of observation and learning, often organized by schools, companies, or groups.
来週、工場の見学会に参加する予定です。
I plan to join a factory study tour next week.
学校で博物館の見学会が行われた。
A museum field trip was held by the school.
Compound of 見学 (kengaku, 'study by observation') + 会 (kai, 'meeting' or 'gathering').