Shirokiya is a chain of Japanese restaurants which mimic the style of traditional izakayas (a kind of Japanese pub) but with a more modern decor. The chain belongs to the Tokyo-based Monteroza company and has outlets all over Japan. The seating in the restaurants is on tatami mats and the food, while good, isn't exactly traditional Japanese. They do, however, have great Korean and Vietnamese dishes as well as some Western dishes like quesadillas and pizzas. It's a good option for eating out when you're with a group of people who all have different tastes.