reserve (that which is reserved, or kept back, as for future use), spare, preliminaries

birds of a feather flock together

call back, recall

bell / doorbell

Alternative form of 白河夜船 (shirakawa yofune)

rest; remainder / excess; surplus; overage

prep school, cram school; privately-run schools marketed to students taking examinations for college admissions

four / fourth

one person / singleness, singularity / one's own efforts or strengths / an unmarried person, single

one person