旅(りょ)行(こう)者(しゃ) ryokoushaたち tachiは wa、川(かわ) kawaを o船(ふね) funeで de渡(わた)っ()た() watatta。 The travelers crossed the river by boat. Literal Travelers [topic-は], river [object-を] boat [with-で] crossed. 川を渡る (to cross a river) uses を for the space traversed. 船で (by boat) uses で for the means of transport. を with movement verbs marks the path or space moved through, not a direct object. travelを (path of motion)
旅(りょ)行(こう)者(しゃ) ryokoushaたち tachiは wa、川(かわ) kawaを o船(ふね) funeで de渡(わた)っ()た() watatta。 The travelers crossed the river by boat. Literal Travelers [topic-は], river [object-を] boat [with-で] crossed. 川を渡る (to cross a river) uses を for the space traversed. 船で (by boat) uses で for the means of transport. を with movement verbs marks the path or space moved through, not a direct object. travelを (path of motion)