Because not all Japanese food is sushi, here you can have a wide variety of dishes (we can say they are tapas, due to its small size) with a great taste.
It is known as a Japanese "fast-food" place, but actually it is not so "fast". They take care on the preparation of every plate, as you choose "à la carte" and they have grilled high quality meat, salads and some other delicious vegetarian specialties.
The fast-food name comes because they make a fusion between this Asian style and the some other food such as French fries or Wiener Schnitzel.
Get some different tapas to share, you will love it!