Ajax secured their fourth consecutive Dutch title on Sunday, and the 33rd of their history, after a 1-1 draw away to Heracles Almelo on the penultimate weekend of the season.
Lasse Schone gave Ajax the lead, and while Heracles soon drew level, the result gives the Amsterdam side an unassailable lead of four points from second-placed Feyenoord, who won 5-1 at home to Cambuur.
Frank de Boer's side have now equalled the Dutch league record for the most successive titles.
The triumph also guarantees direct qualification for next season's Champions League group stage for Ajax, who bounced back from their shock 5-1 loss to Zwolle in the final of the Dutch Cup last weekend.
De Boer, 43, won the title five times with Ajax as a player and has added four more in a row as coach, something that neither Rinus Michels nor Louis van Gaal, two Ajax coaching greats, ever managed.
Ajax's success comes despite the sale of a host of players last summer, including defender Toby Alderweireld, who joined Atletico Madrid, and Danish playmaker Christian Eriksen, who joined Tottenham Hotspur.
Feyenoord are guaranteed to finish second, which carries with it a place in the qualifying rounds for the Champions League.