I think the simpler observation is that it's a Japanese breed name, so they pick a name that fits that. If you look at many of the other breeds, the most common name is clearly a riff on the breed:

Boxer -> Tyson

(Chocolate) labrador -> Hershey

Blue heeler -> Blue

Jack Russell terrier -> Jack

Chihuahua -> lots of Mexican names

King Charles spaniel -> Charlie

Pug -> Pugsly

Dachshund (weiner dog) -> Nathan (brand of hot dogs)

Boston terrier -> Buster (guessing this is because it's similar-sounding)