縦じゅう断だん的てき研けん究きゅうMeaningsNoun1. longitudinal studyKanji used縦vertical断be cut off的target研refine究researchComposed of縦じゅう断だんrunning through (north-south); cutting across; travelling across; cutting vertically; sectioning longitudinallyNoun的てき-ical; -ive; -al; -ic; -y; -like; -ish; -sort of; -kind ofSuffix研けん究きゅうresearch; study; investigationNoun