Developed by a group of National JOTA Organizers, following the idea of Dave Gemmell, NJO of South- Africa, the J-code aims to make a very basic communication possible between Scouts that have no language in common.

It is a fun way to try to link up with someone who you otherwise could not communicate with. The J-code is analogous to the Q-code often used by radio amateurs. The code can be used in radio contacts during the JOTA weekend. It is very well suited for IRC during the JOTI too.