Premiering today on AMC's horror streaming service Shudder is Kôji Shiraishi's Sadako Vs Kayako, a heavyweight battle between two Japanese genre icons. Yes, you heard me right - premiering. Shudder has slowly been building a catalog of new releases - from Mattie Do's Laotian hautner Dearest Sister to Nathan Ambrosioni's found-footage Therapy (made by a teenager!) - but Shiraishi's foreign import may be the platform's biggest catch to date.