N-Suke Yamanaka (N-すけ山中, Yamanaka Enu-Suke) is a police inspector who appears in the Death Note pilot chapter.
Yamanaka is an older man with a short crop of light hair and thick eyebrows. He is seen wearing a suit with a plaid tie.
Yamanaka, along with his subordinate, Takagi, investigates the events at Taro Kagami's school, where five classmates died of heart attacks. They interrogate Miura, since he had been harassed by the bullies who died, before asking Taro for information.
When they finish their questioning, Yamanaka compares their current case to a case he worked on in the late 1970s (Takara Bank, Yamashita Branch) in which two people died of heart attacks and other "accidental" deaths occurred later.
After the five classmates of Taro's return to life, Yamanaka and Takagi return to the school to question them about the day they died. When the five students are about to answer the inspectors' questions, they die again, and Yamanaka and Takagi die as well.
Later, Taro realizes it was Miura who killed them using a Death Note, and he erases their names with the Death Eraser. Taro convinces Miura to confess to the police, and they prove the notebook's effectiveness by having Miura kill Taro and bring him back to life. Yamanaka burns the notebook, but he is unaware that Taro possesses a Death Note as well.
- "N-Suke Yamanaka" is not this character's real name, as it is stated at the beginning of the pilot that all "victims" have had their names changed in order to protect their identities.
- (To Takagi, about Taro Kagami) “Takagi, wasn't that kid a bit strange?”
- (To Takagi) “What if… …you had the ability to kill people just by thinking it? What would you do?”