The action film Killer Number 4 has been officially announced for a spring 2026 theatrical release in Japan, with Hong Kong actor Wei Junsheng and Japanese actress Minami Sara in leading roles. Positioned as a crime-driven action project, the film combines intense combat sequences with themes of revenge, trauma, and the gradual formation of trust between two wounded individuals.
The story centers on a professional assassin from Hong Kong known by the codename “No.4,” portrayed by Wei Junsheng. Renowned for his efficiency and composure, he accepts a contract offering a reward of 100 million yen to travel to Japan and eliminate the Kumagai yakuza organization. After successfully completing the mission, No.4 is confronted by a young woman named Kumo, played by Minami Sara, who claims to be the true client behind the assignment. Her sudden appearance introduces new layers of mystery and shifts the direction of the narrative.
As the plot unfolds, the film follows the evolving bond between No.4 and Kumo. Both characters are survivors of family massacres, carrying deep emotional scars. Their relationship develops into one resembling that of mentor and apprentice, forged through shared danger and mutual understanding. Rather than focusing solely on violence, the film emphasizes character development, exploring how trust is built and tested as the pair confront increasingly powerful enemies together.
Supporting roles are played by a notable ensemble cast, including Takenaka Naoto, Saito Takumi, Kusakawa Takuya of Chotokkyu, Wada Iori, and Mori Yurito. With its blend of action, emotional depth, and an international cast, Killer Number 4 is shaping up to be a film closely watched ahead of its release in 2026.
