Tsugumi Ohba (Japanese: 大場 つぐみ, Hepburn: Ōba Tsugumi) is the pen name of a Japanese gensakusha or writer of manga, 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. (2008–2012), was also successful with 15 million in circulation. In 2014, Ohba collaborated with My Little Monster creator Robico for the one-shot "Skip! Yamada-kun". Another series with Obata called Platinum End began in the December 2015 issue of Jump SQ on November 4, 2015.