Takeshi Obata
A mangaka may both write and illustrate a series of their own creation, or may work together with an author. The mangaka typically has a strong influence on dialog even when paired with a writer, as any conversation must fit within the physical constraints imposed by the art. Takeshi Obata of "Death Note", Tetsuo Hara of "Fist of the North Star", and Ryoichi Ikegami of "Sanctuary" are all successful manga artists who have worked with writers through the majority of their careers.