The Wikipedia article about Jorge Amado's Home Is the Sailor / Os velhos marinheiros ou o capitão de longo curso describes this work as a "Brazilian modernist novel". The corresponding Portugese and Italian Wikipedia articles contain no similar claims. The novel was written in 1961, long after what I know as the heyday of literary modernism, which I associate with the period from around 1900 (or a bit later) until about 1940. (Note: I listed a few differences between realism and modernism in the question In what way is Jorge Amado's novel Jubiabá a modernist novel?.)
What characteristics of Home Is the Sailor make this work a modernist novel? Or is the claim incorrect?