Reading the many positive reviews you can't help but conclude that either a hype or some serious Tripadvisor-rigging is going on. The food is not bad - but nothing special. A bit on the fusion-side - caught in the middle. Only a fraction of the staff is actually Japanese and so is the atmosphere. As this restaurant is slightly off the beaten track, I don't recommend searching for it and going all the way to there: You can get significantly better Japanese food in downtown Vienna. Prices are modest.