The dozens of homeless people sleeping in shuttered Tokyo subway stations worry that with Japan's image at stake authorities will force them to move ahead of the Olympics. Efforts to clean up what some see as urban blight have preceded every recent Olympics, including those in Beijing, London and Rio de Janeiro.  City officials deny they are moving to force the homeless out, but say overnight trespassing in train stations is not allowed. The former laborers, clerical workers and others sleeping in cardboard boxes in the dead of winter are a not-quite-invisible glimpse of a more pervasive but largely hidden underclass of poor in Japan, a wealthy nation mostly seen as orderly and middle class.