The series has been in continuous production for over ten years and celebrated its ten-year anniversary in January 2021. 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. Both the Lego theme and the series had an intended shelf life of three years with the second season planned as the original ending. However, the success of the series and its product line led to the show continuing production, with fourteen seasons and two specials being released as of May 2021. "Ninjago: Masters of Spinjitzu" was produced in Copenhagen, Denmark, by Wil Film ApS for its first ten seasons. The production was relocated to WildBrain Studios in Canada for the eleventh season and the series was retitled "Ninjago".