Tokyo’s metro system ranks number one in the world in number of passengers per year. So, its no wonder that the subways are literally jam packed at rush hour. The subways are so crowded in fact that there are people hired to push the overflowing crowd of passengers into the the trains called “packers”.

These videos show the Japanese subway packers at work during rush hour:

With his photo series Tokyo Compression, photographer Michael Wolf captures the endurance of the subway riders in Tokyo as they tolerate their over crowded commute.