Eddie Jones was named head coach of the Brave Blossoms on Wednesday, six weeks after the Australian quit the Wallabies following their dismal showing at the Rugby World Cup.
Jones previously coached Japan for three years from 2012 and led them to their historic win over South Africa at the 2015 World Cup.
Speculation was rife that he would return after Australian media reported that he had interviewed for the job during the Wallabies' World Cup campaign in France.