research association; research society / group of enthusiasts (as may be found in schools, colleges, etc)

Kyūjitai form of 旅団 (“military brigade”)

research & development; R&D

to start a journey; to embark on a trip; to set forth; to hit the trail

(education) research project, done by Japanese schoolchildren during summer break, to be presented upon return to school

pop culture

a cultured person

cultural festival (a regularly-held Japanese school event meant to display the activities of the students)

(rare) Synonym of サブカルチャー (sabukaruchā, “subculture”)

cultural sphere