Tonkotsu Kazan is a Japanese ramen brand developed by SUNPARK Co., Ltd. Known for its signature Volcano Ramen served in a hot stone bowl, the brand combines authentic Japanese flavors with an entertaining dining experience. It has expanded across Asia and continues recruiting international franchise partners.
SUNPARK Co., Ltd. is a Japanese restaurant company operating both proprietary brands and franchise businesses in Japan and overseas. Tonkotsu Kazan was developed as the company's original ramen brand and first launched in Singapore in 2012, where it was planned and built from scratch before expanding internationally.
Today, the brand operates in Singapore, Thailand, the Philippines, India, Cambodia, and previously operated in the United States. Although the Los Angeles location has since closed, SUNPARK continues to recruit franchise partners for overseas expansion. The company emphasizes authentic Japanese hospitality ("Omotenashi"), operational efficiency, and high-quality products while adapting its business model to local cultures and markets. Tonkotsu Kazan's signature Volcano Ramen, served in a heated stone bowl with dramatic steam rising from a cone-shaped lid, remains the brand's defining feature.
Tonkotsu Kazan differentiates itself through its signature Volcano Ramen, which combines premium tonkotsu broth with a dramatic tableside presentation. Hot soup is poured into a 350°C stone bowl in front of guests, creating a volcanic eruption effect that has become the brand's trademark. This memorable dining experience encourages repeat visits and social media sharing while maintaining authentic Japanese ramen quality. The company also focuses on carefully prepared soup, handmade chashu, specially selected noodles, and safe ingredients to deliver consistent customer satisfaction.
SUNPARK has refined Tonkotsu Kazan through years of overseas operation. According to the company, recipes and operating procedures have been simplified where possible while preserving product quality, making the concept easier to introduce into international markets. The franchisor also places strong emphasis on staff training, Japanese-style hospitality, and adapting operations to local business culture. Having successfully expanded across multiple Asian countries, the company continues seeking franchise partners for further global growth.
Find the Best
Japanese Restaurant Franchise
for Your Market
| Restaurant | Tripadvisor Rating | Survey Date |
|---|---|---|
| Tonkotsu Kazan (Novena, Singapore) | 4.0 / 5.0 (82 reviews) | Checked in July 2026 |
Reference:
Tripadvisor
Tonkotsu Kazan has earned consistently positive reviews for combining authentic Japanese ramen with its signature Volcano Ramen presentation. Customers frequently praise the rich tonkotsu broth, generous portions, and friendly service. Many reviewers also appreciate the nostalgic Japanese atmosphere and side dishes such as gyoza and desserts. The restaurant's distinctive hot stone bowl presentation creates a memorable dining experience that helps differentiate the brand from conventional ramen restaurants.
"Delicious Ramen with Cozy Vibes."
The ramen here is rich and flavorful, with a perfect balance of broth and toppings. The atmosphere is cozy, making it a great spot to enjoy a meal. Service was friendly, though a bit slow during peak hours.
Source:
Tripadvisor
"Great visit everytime!"
Delicious ramen and stone pot ramen! Love the gyoza and ice cream was good too! Never disappointing to get a taste of Japan if you are a fan of Japanese cuisine.
Source:
Tripadvisor
"Tonkotsu Kazan Ramen at Novena"
Small outlet serving ramen which typically sees a good crowd. Very friendly and efficient serving crew.
Source:
Tripadvisor
| Item | Details |
|---|---|
| Franchise Fee | Inquiry Required |
| Initial Investment | Inquiry Required |
| Royalty | Inquiry Required |
References:
Franchise JAPAN – Tonkotsu Kazan
Official Tonkotsu Kazan Website
SUNPARK Co., Ltd.
| Item | Details |
|---|---|
| Company Name | SUNPARK Co., Ltd. |
| Total Number of Restaurants (Including Company-Operated Locations) | Operates restaurants in Japan and overseas. Tonkotsu Kazan has expanded to Singapore, Thailand, the Philippines, India, Cambodia, and previously the United States. (The Los Angeles location has closed.) |
| Address | 1-8-11 Kishibe Minami, Suita City, Osaka 564-0011, Japan |
Tonkotsu Kazan offers a distinctive franchise opportunity by combining authentic Japanese ramen with an entertaining dining experience. Its signature Volcano Ramen, served in a heated stone bowl with a dramatic steam presentation, creates a memorable experience that helps differentiate the brand in competitive restaurant markets. This unique concept has supported the brand's expansion across several Asian countries.
Rather than focusing solely on product quality, SUNPARK emphasizes operational consistency, Japanese-style hospitality, and adapting its business model to local markets. According to the company's official information, these principles have played an important role in its international growth strategy and continue to support new franchise development.
While the company does not publicly disclose franchise fees, initial investment, or royalty information, it actively welcomes inquiries from prospective international partners. Entrepreneurs seeking a Japanese ramen concept with proven overseas operating experience and a recognizable signature product may find Tonkotsu Kazan an attractive franchise opportunity.
Even within Japanese food, the most receptive customer segments vary by genre. This section introduces recommended Japanese food genres based on the characteristics of the prospective area, along with Japanese franchise brands that already operate locations in the United States. The focus is on the food that can be offered by joining each franchise brand.
Gyu-Kaku delivers authenticity through certified Japanese A5 Wagyu. By also featuring USDA Prime beef, they offer steakhouse-quality dining at accessible prices.
From import to processing, Japanese staff strictly manage quality at every step, delivering the same authentic flavor found in premium yakiniku restaurants in Japan.
| Franchise fee | $50,000 |
|---|---|
| Initial investment | Approx. $1,215,444 to $2,606,540 |
| Royalty | 5% on annual sales up to approx. $1,500,000 4.5% on annual sales from approx. $1,500,000 to $2,000,000 4% on annual sales over approx. $2,000,000 |
| Number of restaurants | 825 worldwide (including 63 in the United States and 580 in Asia) |
| TripAdvisor rating | 4.3 out of 5.0 (442 reviews)*2 |
A wide range of toppings, from chicken katsu to omelets, ensures a fresh experience every visit, driving strong customer loyalty.
In addition to toppings, customers can adjust rice portions and spice levels, making the menu enjoyable for those who prefer milder flavors as well as those who want larger portions.
| Initial franchise fee | $40,000 |
|---|---|
| Initial investment | Not listed |
| Royalty | Not listed |
| Number of restaurants | 1,480 worldwide (including 11 in the United States and 1,467 in Asia) |
| TripAdvisor rating | 4.3 out of 5.0 (41 reviews)*3 |
As a popular chain with 861 locations in Japan*1, franchisees are able to consistently serve udon noodles with a firm, chewy texture, supported by the headquarters after opening.
The noodle-making, boiling, and cooling processes are demonstrated in an open kitchen, allowing customers to enjoy a freshly made, live dining experience.
| Franchise fee | $40,000 to $64,000 |
|---|---|
| Initial investment | $1,126,500 to $1,980,000 |
| Royalty | 5% of sales |
| Number of restaurants | 1,188 worldwide (including 23 in the United States and 1,155 in Asia) |
| TripAdvisor rating | 4.5 out of 5.0 (108 reviews)*4 |
*1 Source: Marugame Udon official website(https://jp.marugame.com/shop/), as of a December 2025 survey
*2 TripAdvisor: New York City location, as of October 28, 2025(https://www.tripadvisor.jp/Restaurant_Review-g60763-d3175593-Reviews-Gyu_Kaku_Japanese_BBQ-New_York_City_New_York.html)
*3 TripAdvisor: Irvine location, as of October 28, 2025(https://www.tripadvisor.jp/Restaurant_Review-g32530-d9750729-Reviews-Coco_Ichibanya-Irvine_California.html)
*4 TripAdvisor: Los Angeles location, as of October 28, 2025(https://www.tripadvisor.jp/Restaurant_Review-g32655-d4019757-Reviews-Marugame_Monzo-Los_Angeles_California.html)
* TripAdvisor ratings are based on the highest-rated U.S. location.
*The number of restaurants is based on the following references. As of a December 2025 survey
Gyu-Kaku official website(https://www.gyukaku.ne.jp/world.php)
CoCo Ichibanya official website(https://www.ichibanya.co.jp/comp/ir/finance/highlight/graph01.html)
Marugame Udon official website(https://jp.marugame.com/shop/)
