The poet was so shocked the beautiful scenery of Matsushima,
The poet was so shocked by the beautiful scenery of Matsushima, 'Shocked' is usually followed with 'by', but actually shock is usually a negative emotion, and I think you want to say how amazing the poet thought this place was. So perhaps 'he was so stunned by...' (stunned also has a slightly negative meaning, but it also gives the sense that you cannot move or speak because something is so incredible) or 'he was so impressed by...' would be better in this case.
