Comment by impendia

I haven't, but others have written about the same trip. There's lots of material online these days, I'm not really familiar with it but if you google "Shikoku henro pilgrimage", all the hits will be about the same trip I took.

There is a wonderful book, Japanese Pilgrimage by Oliver Statler. He goes into the history of the pilgrimage and of Kobo Daishi, the monk whose path the trail follows. He also discusses his own personal experience walking the trail.