This donut box from Mr. Donut would seem to indicate that they
are "the" official sponsor of the Real Madrid soccer
team. I wonder why Real Madrid doesn't have Mr. Donut on their jerseys?
Seems the English on the box overstates the relationship a bit.
It is also interesting how a soccer sponsorship would be chosen
for a donut shop. It is true that soccer balls and donuts are both
round, but still... Probably just an excuse or cheaper way to get
a picture of the Beckham, ever so popular in Japan, on the box.