The central pivot of the film is the casting of Rain (Jung Ji-hoon). Primarily known as a K-pop superstar, his casting was initially met with skepticism. However, the production emphasized his rigorous training regimen. Rain spent nearly a year training in various martial arts, including Tae Kwon Do and Karate, while also undergoing a massive physical transformation to achieve a physique defined by extreme muscularity and low body fat. This dedication became a primary marketing point for the film.

: Raizo was trained from childhood by the brutal Lord Ozunu. His training involved extreme physical conditioning and mastering the Kyoketshu-Shogei

: Players must navigate Tsushima Island using a "Shobi Horse" for rapid takedowns and a variety of tools like smoke bombs, grappling hooks, and hand grenades.

, specifically focusing on its high-octane action and Raizo's iconic style.

The most discussed "hot" aspect of the film is undoubtedly Rain’s dedication to the role. To play Raizo, the rogue assassin, Rain underwent a grueling eight-month training regimen involving martial arts, weapons handling, and a strict diet. The result was a shredded, functional physique that performed most of its own stunts, making the fight sequences feel visceral rather than CGI-heavy. High-Octane Action and Visual Style