Takuo Shibuimaru

Takuo Shibuimaru (渋井丸 拓男, Shibuimaru Takuo) is the second person that Light Yagami kills using the Death Note.

Plot
Shibuimaru travels with a group of bikers, and starts harassing a woman in the street. After Light hears his name and sees him chasing this woman, he writes his name down in all possible variants, and uses a condition, a death by traffic accident. A truck slams into Shibuimaru's motorcycle, killing him.

In the manga, Shibuimaru and his group harass the woman, while in the anime he and his group try to sexually attack her, and after his death, Light feels guilty, since Shibuimaru was not a criminal.

In the film
Shibuimaru is a criminal who was never prosecuted for killing five children. Light finds his name in a police database after he hacks onto the NPA server. He finds Shibuimaru in a lounge, bragging about the fact that he was not prosecuted. When a man asks Shibuimaru how he felt, he brags about his acquittal and laughed at the fact that the parents of his victims screamed when they discovered the acquittal.

Shibuimaru finds Light looking over his shoulder and threatens him with a knife. He than backs away and laughs, taunting Light by stating that no-one can prosecute him. Light leaves the lounge just before he finds the Death Note.

At a later point, Shibuimaru sees Light at a train crossing and starts gawking at the law student. Light, who had previously killed another criminal, writes Shibuimaru's name into the Death Note. As a train passes between Light and Shibuimaru, the criminal collapses of a heart attack.

Trivia

 * "Shibutaku" may be a parody of "Kimutaku", nickname of Takuya Kimura, a member of the Japanese idol group, SMAP