The tag implication #59958 carp_streamer -> children's_day_(japan) has been approved.
Reason: Just as things like Easter egg and Christmas tree imply Easter and Christmas because they are things associated with those particular holidays, so ought carp streamer be implied to Children's Day (Japan). (Yes, it's suffixed with _(Japan) because other countries have a Children's Day as well as there being an International Children's Day, all on different days. Consider it futureproofing.)
From Wikipedia, koinobori (carp streamer) states they're traditionally flown on Japan's Children's Day.
EDIT: The tag implication carp_streamer -> children's_day_(japan) (forum #396934) has been approved by @slyroon.
Updated by auto moderator