There's a shrine, hotel, cafes, restaurants, and a shopping mall—all designed by the famous architect Kengo Kuma. It's a perfect spot for a relaxing date. The 'Bookshelf Theater' on the 4th and 5th floors has walls lined with bookshelves. If you love books and anime, you could easily spend the whole day here.
The experience of seeing the Great Torii Gate is totally different at high tide and low tide. It's best to check the tide schedule online before you go. Also, just like in Nara, there are lots of deer living on the island.
This place is huge with tons of brands to choose from. You could easily spend a whole day shopping here. Plus, it's connected to the Aeon mall next door—be careful, your credit card might take a hit!