Bunjuro Nakayama, born May 15, 1964, is a Japanese novelist and manga writer whose career began around 1993. His professional name is derived from a character portrayed by actor Takahiro Tamura in the period drama Tasuke-Nin Hashiru. Early in his career, he wrote novelizations of existing works, such as the manga Ushio & Tora and the adult game Dōkyūsei, sometimes using the pen name Katsuyuki Shiroki. Following the success of his original series Mahoromatic, he began consistently using the name Bunjuro Nakayama for his mainstream works.

Nakayama is best known as the original creator of Mahoromatic, a manga series illustrated by Ditama that was serialized in Comic Gum from 1999 to 2004. The series became a significant hit and was adapted into a television anime, solidifying his reputation in the industry. His other notable original work is the manga Shina Dark: Kuroki Tsuki no Ō to Sōheki no Tsuki no Himegimi. This series, with art by Yukari Higa, was serialized from 2006 to 2009, beginning in Dengeki Teio before moving to Monthly Comic Dengeki Daioh after the former magazine ceased publication. The complete series was compiled into four volumes. The story centers on a resurrected legendary魔王 (demon king) whose peaceful nature contrasts sharply with the fearsome reputation that leads to him being sent over a thousand brides, forming the basis for a new nation.

A recurring element in Nakayama’s work is the blending of comedy, science fiction, and romantic drama, often featuring unconventional domestic or political setups. Mahoromatic follows a combat android working as a maid, while Shina Dark depicts a demon king managing a nascent kingdom. Both series also feature notable female characters in central roles. The thematic undercurrents of exploring peaceful resolutions and personal connections within fantastical or action-oriented premises are also common threads throughout his bibliography.

Beyond these major titles, Nakayama’s body of work as a manga writer includes several other series. He was responsible for the original story of Shiage ni Tachi Ari (illustrated by Kiyoshi Ima no Yo), serialized from 2007 to 2011, and Manyuuba! rideAT (illustrated by Ofuu Yamadori), serialized from 2011 to 2012. His later credits include Sarasa (illustrated by Masayuki Hirate) and the 2014 work Explōdo∞ (with art by Madoka Hoshino). Through these numerous projects, Nakayama has established himself as a significant creator of manga source material, with a career spanning from the 1990s to the 2010s.