Wrestle Kingdom VI in Tokyo Dome (レッスルキングダムⅥ in 東京ドーム, Ressuru Kingudamu Ⅵ in Tōkyō Dōmu) was a professional wrestling pay-per-view (PPV) event produced by the New Japan Pro-Wrestling (NJPW) promotion, which took place at the Tokyo Dome in Tokyo, Japan on January 4, 2012. It was the 21st January 4 Tokyo Dome Show and the sixth held under the "Wrestle Kingdom" name. This was the final Wrestle Kingdom where a Roman numeral was used as part of the event's name. The event featured twelve matches (including one dark match), three of which were contested for championships. Wrestle Kingdom is traditionally NJPW's biggest event of the year and has been described as their equivalent to WWE's WrestleMania.

Outside participants from the All Japan Pro Wrestling (AJPW), Consejo Mundial de Lucha Libre (CMLL) and Pro Wrestling Noah promotions also took part in the show. Following the conclusion of a working relationship between NJPW and the American Total Nonstop Action Wrestling (TNA), the show, for the first time in five years, did not feature wrestlers from TNA.

Wrestle Kingdom VI featured the NJPW return of Kazuchika Okada. Okada was a rookie in 2010, when NJPW, through their international connections, sent him to the American Total Nonstop Action Wrestling (TNA) promotion to gain experience and grow as a wrestler. During his one and a half years in TNA, Okada did little of note; he was dressed up like Kato from The Green Hornet, dubbed "Okato" and made Samoa Joe's sidekick in an angle with D'Angelo Dinero, wrestling only a handful of actual matches. TNA's poor handling of Okada was one of the key factors in NJPW ceasing their relationship with the American promotion, which made Wrestle Kingdom VI the first Tokyo Dome show in five years to not feature any wrestlers from the company. On December 9, 2011, NJPW announced that Okada would return to the promotion at Wrestle Kingdom VI, facing Yoshi-Hashi, who was making his own return from the Mexican Consejo Mundial de Lucha Libre (CMLL) promotion, with whom NJPW also had a working relationship, where, unlike Okada, he had been wrestling a full schedule and improving. Upon his return to NJPW, Okada created himself a new villainous persona named "Rainmaker".

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