Don’t just take my word for it, you can read the whole article right here:

Indeed, Naoshima is probably the most heavily promoted part of Kagawa as a beacon for people to come to Shikoku. There may be some grumbling like, “You know, we DO have MUCH more than JUST Naoshima…” and then some blathering on… and I understand that. There really is a lot of wonderful and interesting and worthy places to see and explore in Kagawa. But Naoshima really is quite cool, and a must-see for first time visitors here.

And then… there is more. Much more. And then there is much more Shikoku to see and explore. This region really is the untouched undiscovered Japan. Welcome! Find out for yourself how cool it is.