The Japanese are fascinated with big body parts. Got a big foot? This will throw the Japanese into fits of laughter and exclamations of "Ooki, desu ne?" ("It's big, isn't it?"). The Japanese often refer to their own faces with amusement because they are generally bigger and rounder compared to the smaller and finer-boned Western faces.
Other times, bigger is better, such as with noses. Noses are an obsession with many Japanese (read any novel by Haruki Murakami), and there is a universal feeling among the Japanese that as a race, they would look better if they had bigger, longer noses.
But that is not the only thing the Japanese are obsessed with when it comes to big body parts.