Kamen Rider Ghost's Official Twitter account had followed all the four members of the group SEKAI NO OWARI. It looks like they are going to perform the OP of Kamen Rider Ghost. By the thinking of SEKAI NO OWARI is the best choice for singing the Opening of Kamen Rider Ghost.
Since their have signed under the label TOY'S FACTORY, so for singing the Opening Theme under avex music creative they might use a different artist name.
Videos by Cast
Woz carrying his King Sougo