As you may know, Anpanman, or rather his creator, Takashi Yanase, is originally from Shikoku (albeit, Kochi, not Kagawa). As a consequence, Anpanman is probably even more ubiquitous on Shikoku than in the rest of Japan (don’t mark my words, I didn’t actually research that). Especially famous and sought after are the Anpanman trains that can be found here and there on the island.
Here is one of them in Takamatsu Station:
Saw one of these and figured it must be some kind of kids cartoon character. It looks fun.
Yes, Anpanman is the most popular cartoon for very young kids.