sentences:  However, this may also simply be because the distinction between socialist publications and ero guro nansensu publications is rather vague in publication legislation.In his book , ero guro nansensu researcher Aratsuki Hiroshi emphasizes that proletarian literature is "sexually perverted" and "erotic and grotesque".In the years following 1936, the censorship began to be enforced even more as the Second Sino-Japanese War begun.