Tsugumi OhbaTsugumi Ohba.

Tsugumi Ohba (Japanese: 大場 つぐみ, Hepburn: Ōba Tsugumi) is the pen name of a Japanese manga writer. He is best known for authoring the Death Note manga series with illustrator Takeshi Obata from 2003 to 2006, which has 30 million collected volumes in circulation. The duo's second series, Bakuman (2008 to 2012), was also successful with 15 million in circulation.