Oshiya. Other hazards of city life are crowded buses, subways, and trains. In Japan, though, they have figured out a way to get even more people on to their trains. They hire special workers, called oshiyas, to push people into the trains, particularly during peak traffic hours. Students looking to earn extra cash are the usual workforce in this sector. Not exactly a great addition to their post-education resumé, though, unless they plan to work for a sardine packinghouse.