In a career full of highlights, Kuyt said this title topped the lot.
Captain Dirk Kuyt was the star, scoring a hat-trick to guide Feyenoord to their first league title since 1999.
"I knew when I came back two years ago that we could win the championship".
Feyenoord, coached by former Arsenal and Barcelona player Giovanni van Bronckhorst, had a chance to secure the championship last week, but were surprisingly beaten 3-0 by neighbours Excelsior Rotterdam in a nervy performance.
The Amsterdam club's next game is the Europa League final against Manchester United on Wednesday, 24 May.
In that time, the Rotterdam club's supporters had watched on as the Netherlands' other big two clubs, PSV Eindhoven (nine) and Ajax (six) had won 15 Eredivisie titles between them.
Feyenoord's title win was welcomed at Café Rembrandt with loud cheers from its St. Maarten fans, who even lit some flares in celebration.
People danced in the fountain of Hofplein Square before a powerful version of "You'll never walk alone" rang around Rotterdam.
"That shouldn't happen-you should only be satisfied when you are winning trophies".
"To those who have doubted me over the years, to those who have knocked me".