In Karthi’s milestone 25th film, “Japan,” the script’s appeal lies in its character-driven narrative. The unconventional protagonist, Japan Muni, stands apart from typical Kollywood heroes as an unabashed robber with flair, grappling with being HIV positive. Director Raju Murugan takes an unapologetically commercial approach, blending mass appeal with a self-aware critique of genre clichés. While the film explores a web of criminals, cops, politicians, businessmen, and film stars revolving around Japan, its drawback emerges from a lack of emotional investment in the proceedings. The plot, initiated by a jewelry showroom robbery, serves as a clothesline for character development. Despite the film’s less serious tone compared to Murugan’s previous works, Karthi’s committed performance and sharp dialogues maintain viewer engagement. The script’s attempt to emotionally anchor the film through an innocent character caught in the web, reminiscent of “Visaaranai,” falls short of leaving a lasting impact on screen. Indulgent scenes involving Japan, particularly in the first half, hinder the overall resonance, but Karthi’s portrayal adds an element of unpredictability to the character, keeping the audience hooked.