Be warned : patties are crépinette in this burger shop. That means, pork caul is used as a net for ground beef. The good point is that the beef is not mixed with egg, bread, onions, flour or any other unwanted stuff nor chemicals. The bad point is, as the caul seems not to be the highest quality - unless the preparation skills of the cook are not good- and therefore, you'll get some cartilaginous bits. And that's a huge bad surprise to hurt your teeth on a hard part while chewing an otherwise super tender burger. This plus the price, 1800 yen for a lunch set, are keeping the fifth star away. On the bright aide, burgers are made of fresh ingredients right in front of you, sizes are generous, the bread, sauce and cheese all melt superbly into a flavorful coating for the juciky and tasty meat. The place is small, with 8 table seats and about 6 counter seats. You can also take away. I ordered a basil and mushroom cheeseburger, but I couldn't feel any of the basil or mushrooms. The burger was super balanced and almost creamy in the mouth, so I liked it anyway. But I guess that most burgers, except the fish ones, taste the same. They have quit a selection of drinks and a real coffee machine, which is rare for a burger restaurant. This place is FULL of French customers, because an influencial YouTuber ranked it the best burger in Japan. That's a subjective view. It's overall a pleasant experience, but a bit expensive and not to be eaten all teeth in, go carefully and expect a few cartilaginous bits.