Mr. Brain

Mr. Brain is a Japanese television comedy drama aired on TBS in 2009.

Sypnosis by TBS (retrieved from wiki.d-addicts.com):

Tsukumo Ryusuke 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.

---

Tropes used in Mr. Brain include:

• Amateur Sleuth: Tsukumo, who tends to get chastised by his boss for not concentrating on his "research".
• Ax Crazy: Kanako in her "Shunsuke" persona.
• Batman Gambit:
  • Tsukumo relies on the culprits' "natural reflexes" (caused by their brains) to expose them.
  • The culprit's schemes in the last two episodes.
• Big Eater: Kanako in her "Shouko" persona.
• Bunny Ears Lawyer: Tsukumo, a brilliant and eccentric neuroscientist.
• Butt Monkey: Kazune.
• Catch Phrase: "My name is Tsukumo, written as 9-10-9 in kanji numerals."
• Chaste Hero: Due to partial brain damage caused by an accident, Tsukumo is totally clueless about Kazune's advances on him, and keeps wondering why he's in possession of a porn magazine in the first place.
• Everyone Calls Him "Barkeep": The cleaning lady.
• Exactly What It Says on the Tin: The show has some very specific episode titles, including:
  • "Eccentric Neuroscientist vs. Beautiful Revived Ghost!!"
  • "Invisible Man Setting Up Serial Murders!!"
  • "Eccentric Neuroscientist vs. Beautiful Woman With A Split Personality!!"
• Expy: Takegami is a manipulative cannibalistic murderer like Hannibal Lecter.
• Fragile Flower: Kanako's original persona.
• I'm a Humanitarian: In the second episode, Gackt's ham-tastic character Takegami Teijirou is a cannibalistic serial killer who considers eating human flesh to be the equivalent of eating beef or pork.
• Insufferable Genius: Even though Tsukumo Ryusuke usually figures out the crimes long before anybody else, he is still considered insufferable by many of his superiors.
• Giggling Villain: Takegami Teijirou.
• Kids Are Cruel: Kanako's classmates ridiculed her request for accompanying her home, resulting in her kidnapping.
• Large Ham: It's obvious Gackt is having a lot of fun playing a cannibal.
• My Name Is Not Durwood: Detective Hayashida is frequently called "Rinda" by Tsukumo.
• No Social Skills: Part of the reasons why many other scientists dislike Tsukumo.
• Not My Driver: Happens to a victim in Episode 7.
• Obviously Evil: Takei, who's bald and is frequently seen with a smug smile on his face. He's actually a case of double subversion of this trope.
• Posthumous Character: Takegami Teijirou.
• Psychotic Smirk: Takegami loves to sport this.
• Real Song Theme Tune: "Jump" by Van Halen.
• Roaring Rampage of Revenge: Some of the culprits.
• Shrinking Violet: Yuri Kazune, although she does have a few moments of assertiveness. Not that anybody listens to her when she does, though.
• Split Personality: Akiyoshi Kanako suffers from this after being kidnapped and imprisoned for 15 years. Then it turns out there are actually no alternate personalities to begin with.
• Trademark Favorite Food: Tsukumo has his bananas.