

50 minSeason 1 • Episode 8
LatestRyusuke Tsukumo is a quirky, yet brilliant neuroscientist working for the National Research Institute of Police Science. Wielding a unique perspective and psychology, Tsukumo tackles the nation's most baffling crimes and scandals, going head-to-head with the most brilliant and twisted criminal minds. But his eccentricities and poor social timing can also aggravate people and circumstances, further complicating matters.
Acting
Kimura's unhinged physical comedy steals every scene
Writing
Cases get progressively wilder and more absurd
Costume
Tsukumo's questionable hairstyle choices are iconic
Trivia, insights & behind the scenes
Kimura reportedly studied actual neuroscience lectures to prepare, which explains why his character sounds convincingly unhinged about synapses.
This aired during the 2009 J-drama boom when 'eccentric genius detective' was peak formula—Mr. Brain stands out for leaning fully into absurdity rather than brooding.