A large part of this is cultural, not linguistic. Japanese syntax has just as much structure to it as English syntax. The difference is that ellipsis is sociall

A large part of this is cultural, not linguistic. Japanese syntax has just as much structure to it as English syntax. The difference is that ellipsis is socially accepted in Japan to a much greater extent than in Anglophone societies. You could generate abbreviated sentences in English, which listeners could understand just as well, but people would think you were being rude.