The first public rupture in his pristine screen persona arrived on television. In 2015, Nippon TV cast Yamazaki as the enigmatic genius detective L in their serial remake of Death Note. Kenichi Matsuyama’s film interpretation of L had achieved iconic status a decade prior, casting a long shadow over any successor. Yamazaki intentionally diverged from the eccentric, hunched-over posture popularized by Matsuyama, offering an L who felt colder, cleaner, and unnervingly calculating. While domestic fan reactions were polarized upon initial broadcast, the performance proved he could project psychological tension without relying on romantic charm.
The definitive television turning point came three years later. In 2018, Yamazaki signed on to headline Kiss That Kills (Todome no Kiss), a Nippon TV production syndicated internationally through Sony's GEM network. As reported by Variety during the Asia TV Forum, the series positioned Yamazaki as Otaro Dojima, a thoroughly corrupt, mercenary nightclub host driven purely by greed and cynical manipulation. The plot traps him in a fatal time-loop triggered by the lethal kiss of a mysterious woman.
Otaro was the antithesis of the high school dream boy. He was selfish, deceitful, and morally compromised. Online forums and critics across Asia widely praised the shift, noting that Yamazaki appeared energized by playing a man motivated by self-preservation rather than high school devotion. That same year, he anchored the Japanese remake of Good Doctor, portraying Minato Shindo, an autistic pediatric surgeon navigating systemic institutional bias. The role required precise emotional calibration to avoid caricature. The show was a domestic ratings success, averaging over 12.4% household viewership in the Kanto region and earning him Best Actor at the 98th Television Drama Academy Awards. His versatility was no longer in question.
