I'm not as scholastic on J-pop as I would like, but one of my stand-out favourites is the horror-themed girl group Necronomidol. They're a fusion of electro-pop and metal, with an aesthetic that mixes Gothic-Kawaii with Kabuki (If only Western pop-music could be that creative). The band have toured frequently in the Far-East and are now bringing an exclusive one-off UK show to the Water Rats in King's Cross. I've already booked a ticket. I think you need to as well.