Kenko Mayonnaise collaborates to enhance the beloved Iburi Gakko Tartare sauce

An Update on a Beloved Japanese Sauce

Kenko Mayo Co., based in Suginami, Tokyo, has partnered with Sankuzer, headquartered in Iizuna, Nagano, to co-develop a special mayonnaise sauce designed for heat preparation. This collaboration aims to revamp the much-loved "Iburi Gakko Tartare" sauce offered at Sankuzer’s popular 久世福商店 (Kuzefuku Shoten) stores. This revamped version is set to hit the shelves on September 1, 2025.

The Motivation Behind the Collaboration

Kenko Mayonnaise has always strived to meet market demands by adapting its products to various culinary environments. With years of experience in product development, the company is dedicated to solving customer challenges. Sankuzer’s philosophy of enhancing the value of delicious food from across Japan resonated deeply with Kenko’s mission. This synergy between the two brands facilitated a fruitful collaboration, leading to the creation of a unique mayonnaise sauce.

The Development Journey

Our primary goal in this update was to achieve a "more natural deliciousness." From the outset, we received positive feedback about the distinct flavor of our mayonnaise, and we focused on maintaining this base taste during development. This led us to re-evaluate the selection of ingredients to maximize the richness of egg flavors while creating innovative combinations.

Moreover, we aimed to enhance the smokiness of the Iburi Gakko and the rich flavor characteristic of tartare sauce.

However, during the development process, we faced significant challenges. One of the major hurdles was ensuring that the mayonnaise could withstand unavoidable high-temperature cooking processes. Striking a balance between retaining the natural flavors of the ingredients while minimizing additives was crucial. The development team worked diligently to create a "heat-resistant mayonnaise sauce" that would not separate or alter in texture or taste.

To improve the heat resistance while preserving flavor, we meticulously reviewed the ratios of oils, vinegars, and other seasonings within the formula, investing considerable time into making the perfect blend.

Through collaborative efforts, both companies successfully developed a product that satisfies all criteria of heat resistance, viscosity, and flavor balance. After nearly a year of extensive tests and approximately more than 30 trials, we are thrilled to have produced a product that meets our strict standards and fulfills our collaborative vision.

Experience Iburi Gakko Tartare Like Never Before

Our revamped sauce proudly features a focus on exquisite taste while ensuring rigorous quality and safety standards. We aim to introduce a unique product that we can confidently recommend to everyone. We hope that the newly developed "Iburi Gakko Tartare with Enhanced Smoky Aroma" will bring joy and delight to your dining table.

Suggested Pairings from our Development Team

- Try pairing it with soft-boiled eggs over rice or drizzle it over roasted vegetables for an oven-baked delight!

Customer feedback shows our tartare sauce complements rice incredibly well. Add it generously over freshly cooked rice or dried horse mackerel for an irresistible flavor.

Additionally, consider enjoying it as a “hot salad” using seasonal vegetables topped with tartare sauce and baked in a toaster. This method allows the tartare to melt perfectly over the vegetables, resulting in a deliciously juicy finished dish. Experiment with different ways to enjoy it!

Moving forward, Kenko Mayonnaise remains committed to listening carefully to our customers and developing products that cater to their evolving preferences.

Product Details

Name: Iburi Gakko Tartare with Enhanced Smoky Aroma
Price: 670 JPY (including tax)
Content: 160g
Storage: Room temperature (refrigerate after opening)
Shelf life: 240 days from the date of manufacture

About Kuzefuku Shoten

Kuzefuku Shoten is a renowned Japanese gourmet select shop. Our buyers traverse the country to discover exceptional artisans and their delicious offerings. We proudly add new value to these unique products, acting as a bridge between creators and customers to deliver exceptional tastes to your table.