Last updated on September 25th, 2026 at 09:45 am
Tokyo’s Square Burger Draws Foreign Tourists With Wagyu, Local Bread and Near-Perfect Reviews
A burger restaurant in Tokyo’s Asakusa district is attracting large numbers of international visitors with a menu item that looks quite different from the burgers most people are familiar with. Kadomasu-The Square Burger has built its reputation around a square-shaped burger made with A5-grade wagyu beef, specially prepared bread and ingredients sourced from long-established businesses in the neighborhood.
The restaurant says the unusual burger has generated significant attention among foreign tourists visiting Tokyo, with overseas visitors accounting for more than 80 percent of its customers. Its location also puts it in a particularly busy part of the capital, close to Sensoji Temple, one of Asakusa’s best-known tourist attractions.
The restaurant’s popularity can also be seen in its online reviews. As of September 2026, Kadomasu-The Square Burger had an average Google rating of 4.9 out of five stars based on more than 2,000 reviews. The rating has helped give the restaurant an impressive online reputation among visitors searching for places to eat in Asakusa.
From Kadomasu to The Square Burger
The restaurant was not originally focused exclusively on its square burger. It previously operated simply under the name Kadomasu and offered a broader selection of food and drinks, including steak skewers, desserts and beverages.
The situation changed after the Square Burger was introduced in the spring of the previous year. According to the restaurant, the new item began attracting considerable attention on social media, particularly among international tourists travelling around Tokyo.
The response was strong enough that the restaurant incorporated the name of its signature burger into its own name, becoming Kadomasu-The Square Burger. The change reflects the importance of the burger to the restaurant’s identity and its growing reputation among visitors from outside Japan.
The location is particularly well suited to attracting tourists. Asakusa receives large numbers of visitors who come to see Sensoji Temple and explore the surrounding streets, shops and restaurants. Kadomasu is located at 2-7-13 Asakusa in Taito Ward, putting the restaurant within this heavily visited part of Tokyo.
Why Is the Burger Square?
The shape of the burger is not simply a gimmick. The restaurant’s name provides part of the explanation. In Japanese, “kado” refers to a corner, making the square shape a natural connection to the name Kadomasu.
There is also a practical reason for making the burger square. Instead of using a conventional round bun and round patty, the restaurant uses square pieces of specially prepared bread with a matching square patty.
The result is immediately recognizable. Customers are not simply being served another standard hamburger with a different topping. The shape, bread and presentation are all intended to make the burger distinct from more familiar fast-food versions.
The Square Burger is also cut into four square pieces before it is served. That makes it easier to eat and gives the sandwich a presentation that fits its name.
A5 Wagyu Is at the Center
The most important ingredient in the Square Burger is the beef. Kadomasu uses A5-grade wagyu for its patties, placing a premium Japanese ingredient at the heart of what is otherwise a familiar international food.
Wagyu has become increasingly popular with visitors to Japan, and using it in a burger provides tourists with another way of trying Japanese beef without ordering a traditional steak.
The burger also offers customers the option of adding cheddar cheese. A serving of wasabi is provided separately, giving diners the opportunity to add a distinctly Japanese flavor to the rich beef.
The combination of wagyu, butter-toasted bread, sauce and optional wasabi creates a burger that is deliberately different from the inexpensive fast-food sandwiches that most tourists might associate with the word burger.
It Uses Bread Rather Than a Conventional Bun
One of the most unusual aspects of the Square Burger is that the restaurant does not use a conventional hamburger bun. Instead, the sandwich is made using specially produced bread supplied by a local Asakusa bakery.
The bakery is Terasawa, which was established in the neighborhood in 1950. The relationship gives the burger another connection with the local community rather than relying entirely on ingredients and products from outside the area.
The bread used for the Square Burger is made specifically for the restaurant. Golden sesame seeds are incorporated into the bread, providing a nutty flavor that complements the beef.
The bread is then toasted on a flat grill with butter. The cooking process is intended to create a crisp exterior while leaving the inside soft and fluffy.
According to the restaurant’s management, the bread is delivered fresh to Kadomasu every morning by Masahiko Terasawa, the bakery’s third-generation owner. That arrangement means the restaurant is not simply buying a standard commercial loaf and cutting it into pieces for its burgers.
A Burger Built Around Asakusa
The use of Terasawa bread is part of a wider attempt to make the Square Burger specifically connected to Asakusa. Rather than presenting it as another generic gourmet burger in Tokyo, Kadomasu has used businesses from the neighborhood to give the product a local identity.
That approach is particularly interesting in a district where tourists can find food from almost every part of Japan and many different countries. By using local suppliers with long histories, the restaurant is attempting to give an international-style food a distinctly Asakusa character.
The bread itself is therefore part of the story. Customers are not just buying a burger containing Japanese beef; they are also eating bread made by a bakery that has been part of the neighborhood since the middle of the 20th century.
The Sauce Has Its Own Long History
The restaurant has also chosen a local partner for its burger sauce. Tokiha Sauce has been part of Asakusa since 1923, making its history even longer than that of the bakery supplying the burger bread.
Kadomasu uses Tokiha’s vegetable-based Nama Sauce as the starting point for the sauce used on the Square Burger. Additional ingredients are added before the sauce is used in the sandwich.
The arrangement gives the burger another connection to the history of Asakusa. Two local businesses with decades of experience are involved in producing components of a food item that is otherwise based on a relatively modern concept.
This mixture of traditional local businesses and a contemporary burger concept is one of the restaurant’s main selling points. It allows Kadomasu to market the Square Burger as something that could only really have been created in this particular part of Tokyo.
A Burger Designed for Tourists
The restaurant’s location and customer base have also influenced the way the Square Burger is presented. With more than 80 percent of customers reportedly coming from overseas, international tourists are a central part of the business.
The burger’s unusual appearance naturally makes it suitable for social media. Visitors can immediately see that it is different from a conventional hamburger, while the square shape provides a distinctive visual feature that can easily be photographed and shared online.
The restaurant says this social media exposure among foreign tourists helped drive interest in the burger after it was introduced.
Asakusa itself also provides a natural source of potential customers. Tourists visiting Sensoji and the surrounding area are already looking for food and experiences that are different from what they can find at home.
Near-Perfect Google Reviews
The restaurant’s Google review rating has become another part of its appeal. As of September 2026, Kadomasu-The Square Burger had a 4.9-star average based on 2,028 reviews.
A high rating can be particularly influential for international visitors who are unfamiliar with restaurants in Tokyo. Tourists often rely on Google reviews when deciding where to eat, especially when they are exploring an unfamiliar neighborhood.
In Kadomasu’s case, the rating is based on more than 2,000 reviews rather than a small number of early customers. That makes the figure considerably more substantial than a high score based on only a handful of ratings.
The restaurant’s management attributes much of its recent attention to foreign tourists and social media, while the large number of reviews provides another indication of how many visitors have interacted with the business.
The Restaurant Does Not Make Everything Available Online
Despite its popularity with international tourists, Kadomasu has an unusual lack of online information in some areas. The restaurant does not have its own website with an online menu, and its official Instagram account does not provide a full list of prices.
That means visitors cannot necessarily check the current cost of the Square Burger online before arriving.
Instead, pricing is displayed on a signboard outside the restaurant. Photographs taken at the location in August showed the Square Burger priced at 2,850 yen, while the version with cheddar cheese was 3,150 yen.
Those prices were recorded at the time the photographs were taken and may change, particularly because restaurant prices can be affected by ingredient costs and other operating expenses.
The absence of an online menu is somewhat unusual for a restaurant that attracts so many overseas visitors. However, the business has continued to receive attention through social media, review platforms and coverage of its distinctive burger.
Wasabi Adds a Japanese Twist
For customers looking for something that connects the burger more directly with Japanese flavors, the restaurant provides wasabi on the side.
The sharp flavor of wasabi offers a contrast to the richness of the wagyu beef, buttered bread and optional cheddar cheese. Because it is served separately, customers can decide how much they want to use rather than having the flavor dominate the entire burger.
The option also provides tourists with an opportunity to experiment with a familiar Western-style food using an ingredient strongly associated with Japanese cuisine.
A Local Business With an International Audience
Kadomasu-The Square Burger is an example of how restaurants in Tokyo can develop products aimed at both local identity and international tourism.
The basic idea of a burger is familiar to customers around the world, but Kadomasu has altered almost every element that makes the sandwich recognizable. The patty is made from A5 wagyu, the bread is specially produced rather than being a conventional bun, the sandwich is square, the sauce comes from a long-established local producer and wasabi is served alongside it.
At the same time, the restaurant has retained its connection to Asakusa through its suppliers and location.
That combination may help explain why the restaurant has attracted so much attention from international visitors. Tourists can understand what a burger is while still getting an experience that feels specific to Tokyo.
From Tourist Attraction to Restaurant Brand
The success of the Square Burger has also changed the identity of Kadomasu itself. What was previously a restaurant offering several different types of food has increasingly become associated with one distinctive product.
The decision to include “The Square Burger” in the restaurant’s name makes that change particularly clear. The burger has become more than another menu item; it is now the central feature of the business’s identity.
For international visitors, the combination of an unusual appearance, premium Japanese beef, local ingredients and a location near Sensoji provides several reasons to add the restaurant to a Tokyo itinerary.
Whether the Square Burger continues to maintain its near-perfect online rating as the number of reviews increases remains to be seen, but the restaurant has already established a substantial following among overseas visitors.
A Different Kind of Tokyo Burger
Tokyo has no shortage of burger restaurants, from international chains to independent gourmet burger shops. Kadomasu-The Square Burger is attempting to distinguish itself by taking the familiar hamburger and rebuilding it around local ingredients and the character of Asakusa.
Its square A5 wagyu patty, sesame-studded bread, butter-toasted exterior, local sauce and optional wasabi make the finished product quite different from a conventional fast-food burger.
The restaurant’s reported 4.9-star Google rating and more than 2,000 reviews show that the concept has attracted considerable attention, while the claim that more than 80 percent of customers are overseas visitors demonstrates how closely the business has become connected with Tokyo’s international tourism market.
For visitors exploring Asakusa, the Square Burger represents an unusual meeting point between familiar Western food and Japanese ingredients and local history. Instead of simply reproducing a burger that could be found anywhere, Kadomasu has used the neighborhood around it to create something with a distinctly Tokyo identity.
