Ichijinsha

is a Japanese publishing company focused on manga-related publication, including magazines and books. As of October 2016, Ichijinsha was acquired by Kodansha and became its wholly owned subsidiary.

The company was first established in August 1992 as a limited company under the name Studio DNA whose main purpose was to edit shōnen manga. In January 1998, Studio DNA became a public company and moved from merely editing to now being a publishing company. In December 2001, a publishing company was formed named Issaisha which started the shōjo manga magazine Monthly Comic Zero Sum. In March 2005, Studio DNA and Issaisha merged into the current Ichijinsha company.

On April 6, 2023, it announced it was launching a new web manga brand Echo with e-book distribution service Comic Seymour. The brand will produce works targeted towards 20-40-year-old women (josei?).

Magazine

 * Josei manga magazines
 * - monthly: released on the 28th of every month


 * Josei/Shōjo manga magazines
 * - "justice for girls."; monthly: released on the 18th of every month


 * Shōnen manga magazines




 * Ended
 * (formerly Chara☆Mel)
 * Manga 4-Koma Palette
 * The four-panel comic strip magazine Manga 4-Koma Palette (まんが4コマぱれっと, Manga Yonkoma Paretto) started as a special edition of Comic Rex.
 * gateau
 * THE IDOLM@STER MILLION LIVE! MAGAZINE Plus+, renewal of THE IDOLM@STER MILLION LIVE! MAGAZINE

Web magazines

 * comic POOL (jointly with Pixiv)
 * comic LAKE
 * Echo (launched 2023 jointly with Comic Seymour)
 * comic LAKE
 * Echo (launched 2023 jointly with Comic Seymour)
 * Echo (launched 2023 jointly with Comic Seymour)
 * Echo (launched 2023 jointly with Comic Seymour)
 * Echo (launched 2023 jointly with Comic Seymour)
 * Echo (launched 2023 jointly with Comic Seymour)


 * Compiled manga
 * LOVEBITES (jointly with Comic Seymour)

Defunct magazines

 * Comic Yuri Hime S
 * Waai!
 * Waai! Mahalo
 * Comic Zeru-Sum Zoukan WARD
 * Manga Palette Lite
 * Niconico Yuri Hime (web magazine, jointly with Nico Nico Douga)

Anime production

 * Wotakoi: Love is Hard for Otaku
 * Masamune-kun's Revenge
 * Citrus
 * Engaged to the Unidentified
 * My Next Life as a Villainess: All Routes Lead to Doom!
 * Karneval
 * Shomin Sample
 * KoiKimo: It's Disgusting to Call This Love
 * Wataten!: An Angel Flew Down to Me
 * Hitorijime My Hero