Anchor: Asakusa is the heart of Shitamachi, the quarter best-beloved of that fractious, gossipy, prodigal population called the Edokko, who trace their downtown roots back at least three generations.
Entailed: The downtown roots of the Eddokko can be traced back three or more generations.
Contradiction: The Edokko are a population that never engages in gossip.
Contradiction: Despite having a huge staff, the acid rain cap program is lagging behind due to old technology.
Contradiction: A young person is outside.
Contradiction: Filters make them prone to higher maintenance.  
Contradiction: it has been a significant source of the tremendous growth in volume.