Are Japanese westernized in diet?

Not really. I think it's half and half. There are many delicious foods in Japan, such as octopus roast and Kobe beef.

Westernization is a little. Japan has been deeply influenced by European and American cultures for a long time, and it is inevitable that there will be some cultural worship. In the eyes of many Japanese, western food is the representative of high-end products. Watching Japanese dramas and cartoons, we can see the shadow of Japan being westernized in many ways. It's not just catering.

Haruki Murakami was a "die-hard fan" of European and American literature in his early years, and The Great Gatsby is one of a large number of western literary works he has read. Because of his extensive reading, his thoughts and works have also been influenced to some extent. So it is not surprising that there are so many foreign IDs in Haruki Murakami's works.