The two donned white protective hazmat suits and hard hats Wednesday as they visited the crippled facility.
They observed as thousands of workers attempted to remove spent fuel rods and built tanks to store water contaminated by the damage the facility sustained.
Schlossberg, 21, is a history major at Yale and said he wanted to raise awareness of the disaster.
"I hope my peers, my generation in the United States will keep Fukushima in mind and understand that there is still work to be done and we can all do something to help," he said.
Notable deaths of 2014 [PHOTOS]