Island of Memories

The Island of Memories is described in the game's intro as being a "remote island" that's "just off the coast of Maine", is filled with "left over artifacts from the good old days", and somehow has "the power to awaken formative memories in all those who visit." It was also named "Place to Find the Lost" in an ancient language.

It's never explained how this works. But while on the island, JJ finds herself recovering memories from her past via her phone, while also searching for her lost friend Emily. It appears that Memoria Island does indeed work as advertised.

It seems to be implied that JJ and Emily have visited this island multiple times in the past. When the game's title card first appears during gameplay, ghostly images of JJ and Emily spending time together can be seen. If these are memories of the past, then it is likely that JJ and Emily have visited this place before.

As a bit of a behind the scenes detail, Swery, the game's director, originally planned to set the game in Massachusetts, until someone told him that Maine had better nature and scenery.