Why do scholars believe that Basho revised his journal after his travels to the north?

Scholars believe that Basho revised his journal after his travels to the north to refine his poetic style and enhance the thematic depth of his observations. The revisions reflect his evolving philosophy of nature and the human experience, showcasing a greater emphasis on simplicity and the beauty of transient moments. Additionally, these edits allowed him to integrate his experiences into a more cohesive narrative, aligning with his aspirations as a master haiku poet. Overall, the revisions underscore his commitment to artistic growth and the pursuit of deeper meaning in his work.