So I don't really know that any of what we ordered would be big in Japan but it was a big hit with us!. Between four people we had 2 ramens, 1 rice bowl and 1 appetizer. Serving sizes were huge and we almost couldn't finish everything but with top buttons undone we managed to.
For the appi we had an agedashi tofu which was fantastic. It was a great balance of fried tofu, sauce and seasoning. Plus, I really enjoyed the thin as air batter which. The ramens and rice bowls were all equally as good with the creamy one being standout. I can't remember the name of it but I remember it was creamy and had eggplant and was unlike any ramen I've tasted before. It was bursting with flavor, little sides of mushroom and veggies and was SO good. I would go back just for this ramen alone. The other dishes were good, but compared against the above ramen, it just wasn't as delicious.
Overall, Big in Japan is a bit hit in my belly and I can't wait to go back and indulge. Five stars for creativity, service and unique items.