. >> reporter: 33-year-old mayumi is one of the factory employees who kept showing up at work, despite the lingering fears. >> translator: i am trying my best to maintain quality of the product. >> reporter: the mother of two couldn't quit her job for financial reasons. she also felt compelled to stay in the city where she was born and raised. still, concerns about radiation were never far away her children usually had more to ask than, how was your day, whenever she finished a shift. >> translator: i asked her if she was all right with the radiation. >> translator: actually, she told me to stay away because radiation was infectious. >> reporter: jokes aside, she takes her role at factory seriously. she sees it as part of the larger effort to help japan deal with the fukushima accident. >> translator: i want the nuclear disaster to be contained as soon as possible. it's not really for my own sake, but for the future of our children. >> reporter: the masks they make here thousands a day help protect crews on the front lines of the fight to clean up fukushima daiichi. the workers hope th