Established. May 1948
Mainly pubishes Seinen manga.

Web Comic Action (2013) and Web Action (2020) are two different websites. You can check here which series are original series of Web Action. Some WA series that under Web Original title, are from WCA and these ones are not updated on WCA anymore.

Jour is the old name for Jour Suteki na Shufu-tachi. The magazine changed its name in 2000.* According to wikipedia, Jour Suteki na Shufu-tachi has been renamed again as Jour in 2021.

Please don't change the year in an entry if you're not sure when it's released. The first thing is prioritize the release date in the magazine and not the volume release date that will come out later. It's as simple as when the serialization started and ended. For compilations of author's works, they are distributed in various magazines with different dates so the volume release date can be used when it comes out. Users will come and go to fix so please check together with the correct info.

Comic Marginal Label/Magazine changed the name to Chillche. Shitasaki kara Koi by Momose An is the first manga published under Chillche label. Comic Marginal titles from now on will be published under Chillche label