Dominion 6.4 in Osaka-jo Hall

Dominion 6.12 in Osaka-jo Hall will feature professional wrestling matches that involved different wrestlers from pre-existing scripted feuds and storylines. Wrestlers portrayed villains, heroes, or less distinguishable characters in the scripted events that built tension and culminated in a wrestling match or series of matches.[1]

On April 9, NJPW announced a tournament will take place which the winner would receive a future IWGP United States Heavyweight Championship match with the participants being former title holders; Lance Archer, Juice Robinson, Will Ospreay and Hiroshi Tanahashi.[2] On April 16, NJPW suspended Juice Robinson for attacking Fred Rosser before their match at Capital Collision, as a result Rosser took Robinson's place in the tournament.[3] Archer would defeat Rosser on April 16 at Collision in Philadelphia in order to advance to the finals.[4] Opsreay and Tanahashi would face each other at Resurgence on May 21, with the winner facing Archer at Dominion.[2]

On May 3, at Wrestling Dontaku, Sanada would successfully defend the IWGP World Heavyweight Championship against former Los Ingobernables de Japon stablemate Hiromu Takahashi in the main event. After the match, saw the return of Yota Tsuji from excursion, who would take out Sanada's Just 5 Guys stablemates and then speared Sanada in the ring, Tsuji held up the IWGP World Heavyweight Championship indicating a future title match.[5] The title match was announced the following day for Dominion.