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.

Magazine

 * Febri (formerly Chara☆Mel)
 * Monthly Comic Rex
 * Monthly Comic Zero Sum
 * Comic Yuri Hime
 * 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

 * Zero Sum Online
 * comic POOL (jointly with Pixiv)
 * Curihime@Pixiv
 * LOVEBITES (jointly with Seymour)
 * Manga 4-koma Palette Online

Defunct magazines

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

Anime production

 * Wotakoi: Love is Hard for Otaku
 * Masamune-kun no Revenge
 * Citrus
 * Mikakunin de Shinkōkei
 * My Next Life as a Villainess: All Routes Lead to Doom!
 * Karneval
 * Shomin Sample
 * Koi to Yobu ni wa Kimochi Warui
 * Watashi ni Tenshi ga Maiorita!
 * Hitorijime My Hero