Quirky little Japanese joint on the edge of Chinatown, that’s been going since 1992. You enter through a sliding door, the ground floor dining room a series of spartan benches and tables. Although they serve maki and nigiri sushi, unusually for a Japanese restaurant, you will not find any kind of tuna listed, a stance taken in response to concerns about overfishing and sustainability. The main focus of the menu is simple cooked dishes such as katsu don, breaded pork over rice, and oyako don, ‘parent and child’ – a mixture of chicken, soft-cooked egg and spring onion. There are also noodle dishes such as curry udon and bento boxes of chicken or salmon teriyaki. On the way out you’re confronted with another Tokyo Diner quirk, they don’t accept tips because – as they explain – in Japan it’s not the custom.