In America we have the famous after Christmas sales. In Japan, as the biggest holiday of the year is New Year's Day they have after New Year's sales or Hatsu−uri, literally "first sale". But on top of that, one of the big traditions during this time is the tradition of Fukubukuro pronounced foo−koo−boo−koo−row. Fuku means surprise, bukuro means bag. In English we would call them "gab bags"