
It aired on various Cartoon Network feeds internationally. In Denmark, where the series' original production companies are located, it premiered on Cartoon Network. The series concluded on October 1, 2022, with the second part of the fifteenth season being released on Netflix in Australia and New Zealand. The production was relocated to WildBrain Studios in Canada for the eleventh season, and the series was retitled Ninjago.

Ninjago: Masters of Spinjitzu was produced in Copenhagen, Denmark, by Wil Film ApS for its first ten seasons. However, the success of the series and its product line led to the show continuing production, with thirteen more seasons, a special, a feature film adaptation, and a four-episode miniseries being released.

Both the Lego theme and the series had an intended shelf life of three years with the second season planned as the original ending. It began with two pilot episodes in January 2011, which were followed by two 13-episode seasons that aired from December 2011 to November 2012. The series was in continuous production for over a decade and celebrated its tenth anniversary on January 14, 2021. The music was scored by composers Michael Kramer and Jay Vincent. The English-language voice cast was recorded in Canada for its entire run. The show features a large ensemble cast of voice actors who had recurring roles in the series. The storyline was written by Kevin and Dan Hageman until the ninth season their successor as the head writer was Bragi Schut. The series was created by Michael Hegner and Tommy Andreasen, two Danish film producers.

It centers on the fictional world of Ninjago, telling the story of a group of six teenage ninjas and their battles against the forces of evil. It was created to coincide with the Lego Ninjago line of construction toys, which is based on the characters and events of the series. Ninjago (previously known as Ninjago: Masters of Spinjitzu until 2019) is a computer-animated epic-fantasy superhero television series produced by The Lego Group.
