He is one of the most well-known figures in Japanese history and is accredited with many great deeds. Throughout Japan, one often hears his name and one can visit the many places that he is said to have visited during his lifetime. He became the 8th Patriach of Shingon Buddhism and actively spread the teachings of this new religion in Japan. As well, he is accredited with founding the Shikoku pilgrimage and so, people today believe that this route is a journey which follows his footsteps. However, people also believe that Kobo Daishi accompanies pilgrims as they do the pilgrimage as shown by the phrase, dogyo ninin (same practice, two people).
Source: Shikoku Japan 88 Route Guidee