underground rave scene in osaka

Hello I am raver in osaka until monday morning and i would loveee to see what the underground rave scene is like. Ive been checking RA but it all seems to be clubs. I want some grimmy underground and I feel like osaka would possibly be able to provide. I am willing to travel to other nearby cities to go to a good rave. I am not the biggest fan of house so any tecnho or better yet dubstep or hardstyle or trance would be preferred!