Kaka unfurled a special customised shirt to celebrate the landmark to the applause of the San Siro faithful.
But Milan CEO Adriano Galliani had to explain what all the fuss was about for Honda.
Honda has completed his move to AC Milan in recent days and you can forgive him for not knowing his club history inside out.
But the reaction from Honda even once the clapping started was pretty lethargic. A couple of seconds later, he'd given up the game of pretending to care.
Not the best start, Keisuke.