Live-action fantasy “Kitaro,” based on the iconic Shigeru Mizuki comic, has set a B.O. record for distrib Shochiku in its first week of release.Opening April 28 on 339 screens, “Kitaro” scored ¥1,022,528,950 ($8.6 million) in its first week, good enough for the No. 2 spot on the national B.O. chart after “Spider-Man 3” and besting the opening record for a Japanese pic released by Shochiku. Directed by Katsuhide Motoki (“Free & Easy” series, “Drugstore Girl”), “Kitaro” stars Eiji Wentz, half of the pop mega-duo WaT, as the title hero, a boy specter or “yokai” who defends humans from otherworldly monsters and ghosts.