Sushi Restaurants London: popular, simple, healthy. There are approximately 100,000 Japanese people living in the United Kingdom, and most of these live in London. These members of the Japanese diaspora, who are individually known as 'nikkei', are concentrated in North London’s Golders Green and East Finchley districts. West London and South London’s Croydon also have significant Japanese communities. Accordingly, its easy to find London sushi restaurants. Besides, sushi has become a worldwide food phenomenon. London also hosts an annual celebration of Japanese culture that takes the form of London Japan Matsuri. Here, you can find stalls representing the best sushi restaurants in London plus a few pop-ups to satisfy your love of sushi.