custodial duties; duty of care and custody
Legal term referring to the obligation to supervise and protect someone, often a minor or a person under guardianship.
Parents have custodial duties toward their minor children.
A guardian bears the duty of care and custody for the ward.
監護 means 'custody' or 'care and supervision' in general, while 監護義務 specifically refers to the legal obligation of such care.
後見 is 'guardianship' as a legal status, whereas 監護義務 is the concrete duty of care that comes with it.
Compound of 監護 (custody, care and supervision) and 義務 (duty, obligation). The exact historical derivation is uncertain; the term is used in modern legal contexts.