Miyajima is the name usually used while referring to this small island. However, its official name is Itsukushima.
Besides the beautiful giant torii gate you can find there many cute deer. 😉 And many other attractions. Of course, while being in Itsukushima island you should also visit the Itsukushima Shrine, a UNESCO World Heritage Site. And simply take a walk exploring this small romantic island. 🙂