A polite and respectful way to address one’s mother.
: The verb itadaku means "to receive" but also carries the image of placing something above one's head in a gesture of extreme respect. okaasan itadakimasu link
Historically, and even in modern Japan, the mother often eats last, takes the smallest portion, or eats standing up in the kitchen. Her role is to give first. The phrase Itadakimasu is the child’s acknowledgment of that quiet sacrifice. A polite and respectful way to address one’s mother