In "I've Got Your Number" by Sophie Kinsella, the protagonist expresses her lack of knowledge about Japanese culture and business practices. She humorously admits that her only familiarity comes from sushi, which she finds insufficient for engaging in meaningful conversations with someone from that background. This reflects a broader theme of cultural misunderstanding and the challenges of connecting with others from different cultural contexts.
The character realizes that approaching someone solely based on a superficial commonality, like sushi, might come off as awkward or misplaced, akin to an American businessman being greeted with a random food reference. This highlights the difficulties individuals face when trying to bridge cultural gaps and the importance of genuine understanding and respect in communication.