Double-J (だぶるじぇい) is a Japanese manga series written by Eiji Nonaka and illustrated by Maru Asakura. It began serialization in July 2009 in Kodansha's Weekly Shōnen Magazine. An 11-episode anime adaptation produced by DLE aired between June and September 2011.
In a school where after school activities are mandatory among all students, Hajime and her friend Sayo come across a new club that they have never seen before. The club is called "The Cultural Activity Preservation Club." The two enter the room to find all kinds of analog jobs and activities, such as handcrafting mats and toothpicks. This is a unique cultural manga mixed with comedy.