Sadako vs. Kayako
Theatrical release poster
Japanese name
Kanji	貞子 vs 伽椰子
Transcriptions Revised Hepburn Sadako bāsasu Kayako
Directed by	Kōji Shiraishi
Screenplay by	Kōji Shiraishi
Based on	Ring by Koji Suzuki and Ju-On by Takashi Shimizu
Starring	Mizuki Yamamoto Tina Tamashiro
Production companies	Kadokawa Daiei Studio NBCUniversal Entertainment Japan
Distributed by	PKDN Films (via. Universal Pictures)
Release date	June 18, 2016 (2016-06-18)
Running time	98 minutes
Country	Japan
Language	Japanese
Box office	$9.3 million[1]

Sadako vs. Kayako (貞子 vs 伽椰子, Sadako bāsasu Kayako) is a 2016 Japanese supernatural comedy horror film directed by Kōji Shiraishi. It is a crossover of the Ju-on and Ring series. The film was first teased as an April Fools' joke on April 1, 2015, but was later confirmed on December 10 to be a real production.^[2] It was released in Japan on June 18, 2016, Indonesia on August 10 (followed by 4DX on February 15, 2017),^[3] and in North America on the streaming site Shudder on January 26, 2017.^[4] It received mixed reviews from critics.

A social worker visits the residence of an elderly woman, only to find her strangled by an electric cord. A nearby video player suddenly turns on and plays the cursed videotape. As she watches, Sadako Yamamura appears and kills the social worker.

The video player is sold at a shop and bought by university students Yuri Kurahashi and Natsumi Ueno. When they find the cursed videotape inside, they play it. The deadline for the curse has been reduced to two days and the footage has been upgraded to display a decrepit building instead of the usual well. Yuri gets distracted by her phone, leaving Natsumi to watch the tape in its entirety by herself. Afterward, they receive a disturbing phone call as Sadako manifests in the room behind Yuri, startling Natsumi.

A worker at the shop who had watched the cursed tape leaps to her death. The girls go to return the video player and learn about the deaths related to the tape. Desperate, they go to their professor, an author on urban legends, Shin'ichi Morishige. Obsessed with the idea of meeting Sadako, Morishige eagerly watches the tape, although the girls are less than thrilled, as Natsumi only has one day to live. After he receives a phone call, Morishige takes the girls to an exorcist, however, Sadako possesses Natsumi and forces the assistants to kill themselves before the exorcist begins to boil from the inside and kills Morishige for interfering. With her dying breath, the exorcist tells the girls that a man with psychic powers, Keizo Tokiwa, will help them.

When a despondent Natsumi blames Yuri for her situation, Yuri watches the tape, hoping that this will pass the curse on to her and Natsumi will be spared. Keizo arrives, accompanied by a blind psychic girl, Tamao, who tells Yuri that she has unnecessarily cursed herself. The only way to expunge the curse is to pit Sadako against another vengeful spirit so both destroy each other. As Yuri hears that Natsumi has uploaded the cursed tape onto the Internet, Natsumi tries to commit suicide to escape her imminent death. Whilst Yuri rushes to save Natsumi, Sadako appears before Natsumi and kills her via hanging. Keizo and Tamao target Kayako Saeki to be the rival spirit.

Meanwhile, high school student Suzuka Takagi starts having dreams of the haunted Saeki house after moving in nearby with her family. She runs into Keizo and Tamao, who states that the house beckons to Suzuka, he warns her not to enter or she will be killed. After Suzuka leaves, a group of bullies arrive and force a schoolboy to enter the Saeki house. However, Kayako and Toshio violently drag all of them to their demise, including the schoolboy and the group leader who gets killed by having his head snapped off by Toshio.

That night, Suzuka thinks she sees a schoolboy inside the Saeki house and goes inside. She sees Toshio and her screams prompt her parents to rush in, only to be killed by Toshio and Kayako. Keizo saves Suzuka, but she is already cursed. Yuri and Suzuka agree to team up for Keizo's plan, where they enter the Saeki house so that Suzuka can watch the cursed videotape inside and Yuri can see Kayako, thus becoming afflicted with both curses. Keizo hopes this will make Sadako and Kayako fight over the girls and obliterate each other in the process.

As the plan unfolds, Toshio appears, but Sadako drags him inside the TV as he screams. Sadako crawls out of the TV whilst Kayako crawls downstairs, they brutally confront each other, but the battle ends in a stalemate. Keizo reveals his last resort: one of the girls has to lure both ghosts into a well outside of the house so they can be sealed inside. Yuri chooses to sacrifice herself, jumping into the well as Sadako and Kayako begin to rush toward her, resulting in a massive collision that bisects Keizo and turns both ghosts into a giant mass of hair, flesh, and eyes. The giant mass falls into the well, presumably crushing Yuri to death. Suzuka seals the well and imprisons the ghosts.

This last resort does not work either, and instead backfires terribly: both Sadako and Kayako's curses combine and become a single entity: Sadakaya. Now possessing Yuri's body with the appearance of Sadako, a combined movement of both spirits and the sound of Kayako's death rattle. Suzuka screams in horror, and Tamao's psychic powers are overwhelmed. Toshio reappears behind them, and the girls' fates are left unknown.

In a post-credits scene, the modified version of the cursed videotape is shown. Sadakaya menacingly contorts her body, imitating the movements of both Sadako and Kayako. She then teleports to the screen, emitting a death rattle.

• Mizuki Yamamoto as Yūri Kurahashi/Sadakaya
• Tina Tamashiro as Suzuka Takagi
• Aimi Satsukawa as Natsumi Ueno
• Masahiro Komoto as Shin'ichi Morishige
• Masanobu Andō as Keizō Tokiwa
• Mai Kikuchi as Tamao
• Misato Tanaka as Fumiko Takagi
• Masayoshi Matsushima as Sukemune Takagi
• Ichiruko Domen as Hōryū
• Runa Endo as Kayako Saeki
• Elly Nanami as Sadako Yamamura
• Rintaro Shibamoto as Toshio Saeki

Despite a rumor about Takako Fuji reprising her role as Kayako in this crossover, the actress stated several times on Twitter that she was not playing this representation of the character.^[5] Masaki Saisho, who played Kayako in Ju-On: The Beginning of the End and Ju-On: The Final Curse, does not appear in the film either.^[6] This makes Runa Endo the fifth actress to play Kayako (counting Aiko Horiuchi, who starred in The Grudge 3 and Anna Moon in Tales from the Grudge).

As for Sadako, Elly Nanami is the seventh actress to play the role, after Rie Inō (Ring, Ring 2), Hinako Saeki (Rasen), Ayane Miura (Ring: Kanzenban), Tae Kimura (Ring: The Final Chapter, Rasen), Yukie Nakama (Ring 0: Birthday) and Ai Hashimoto (Sadako 3D) (excluding Samara Morgan's and Park Eun-Suh's incarnations from The Ring and The Ring Virus respectively).

The film's theme song is "Noroi no Shananana" (呪いのシャ・ナ・ナ・ナ) by the heavy metal band Seikima-II. It was released as part of a double A-side single on June 15, 2016, which also included an English-language version of the song.^[7]

Several events were held for the promotion of the movie. On Twitter, users could vote for either Sadako or Kayako as their favorite horror icon up until the day of the film's release.^[8] Two videos, one for Sadako and one for Kayako and Toshio, were uploaded to YouTube to appeal to voters. Sadako won. At the end of May, a press conference was held to promote the film. As with the previous Ju-on films, Sadako, Kayako, and Toshio were present, in costume, and stayed true to their roles.^[9] In the beginning of June, a baseball match featuring the Nippon-Ham Fighters and the Yakult Swallows was interrupted by Sadako, Kayako, and Toshio who staged the first pit ceremony.^[10] Other videos were released at the same time, featuring the ghosts of the movie teaching theater etiquette, such as not bringing recording devices or avoiding to take minors to see the movie.^[11] Social media was also heavily used to promote the movie. A Twitter account created for Sadako (as a promotion for the Sadako 3D movie) was reused.^[12] An Instagram account was created for Kayako and Toshio, depicting humorous, everyday life situations with the two ghosts.^[13] Promotional items playing on the Kawaii culture regularly seen in Japan were released. These items included cup hangers,^[14] beauty masks^[15] and even a collaboration with the Hello Kitty brand.^[16] Other items were more traditional, such as T-shirts, key rings and doorknob hangers.^[17]

On December 2–4, and December 9–25, 2016, they began to promote Kayako and Sadako into the virtual reality at Laforet Harajuku, as they held a virtual experience to celebrate the film's home video release.^[18] Shudder later released with the English subtitles on January 26, 2017.^[19]

The film has received mixed reviews. On the review aggregator website Rotten Tomatoes, 48% of 21 critics' reviews are positive, with an average rating of 5.4/10.^[20] John Squires of Bloody Disgusting complained that the title was deceptive: "It's not merely that it takes too long to get to the good stuff, it's that the good stuff never comes at all".^[21] He further stated the film was just not interesting: "Feeling like a reboot of The Ring crudely smashed together with a reboot of The Grudge, the film hardly brings the two franchises together in any sort of creative fashion, and it's all very clunky; worse yet, it's incredibly boring".^[21] Joe Lipsett, also writing for Bloody Disgusting, agreed saying that "the biggest flaw of Sadako vs. Kayako is that it takes far, far too long to get the titular to face off.....Even the narrative hoops required to bring the two franchises together don't hold up under scrutiny!"^[22]

More positive reviews include Chris Alexander, writing for Comingsoon.net, who found the film to be "goofy but entertaining".^[23] Katie Rife for The A.V. Club admitted that the "vs" in the title came up short, but said: "Still, for fans of Japanese horror looking for popcorn entertainment, or for fans of Western horror looking for something different-yet-familiar, it's worth indulging your curiosity for 98 minutes".^[24]

• Freddy vs. Jason
• Alien vs. Predator
• The Ring (franchise)
• Ju-On (franchise)
• List of ghost films

• Official website (in Japanese)
• Sadako vs. Kayako at IMDb
• Sadako vs. Kayako at Rotten Tomatoes