In a garage on a busy road in Itabashi ward in northern Tokyo, Miyu Kojima has finished her day's work. It's a cold night in February. Cleaning products sit on one side of the garage; people's belongings are stacked on green trolleys and cardboard boxes marked "ToDo-Company" on the other. These items used to belong to the people whose homes Miyu and her colleagues have cleaned. They will be recycled or sold.