This is Takabisha. Currently the world's steepest roller coaster in Japan at Fuji-Q Highland. A clone of this ride (which is stated to be steeper) will be coming to the US in
Takabisha: Thrill seekers on world's steepest roller coaster drop in Japan | Daily Mail Online
Worlds Best Roller Coasters. Japanese TAKABISHA - YouTube
World's Steepest Roller Coaster to Open in Japan | WIRED