[Shiratoga Research Institute x Keiei Sanbo] Shiratoga Research Institute Welcomes "Sanbo," a Community for Business Owners They Admired, into its Group for Joint Operation. While Preserving the "Best Place to Be" Created by Representative Shintani, a New Synergy Emerges.

Shiratoga Research Institute Inc. (Headquarters: Chuo-ku, Tokyo, President & CEO: Tetsuya Ishikawa), whose mission is to "Energize Presidents of Small and Medium-Sized Venture Companies!", has acquired the "Community Business (Sanbo)" from Keiei Sanbo Co., Ltd. (Headquarters: Shinjuku-ku, Tokyo, Representative Director: Kenji Shintani), and has welcomed this business into the Shiratoga Research Institute Group.

## First Report: Transition to a Joint Operation System by Both Companies
This initiative is not an acquisition of the "company" Keiei Sanbo Co., Ltd. Instead, Shiratoga Research Institute was intensely impressed by the "community business" operated by Keiei Sanbo and has transitioned to a joint operation system to further enhance this business together.

## Why Did Shiratoga Research Institute's Ishikawa Fall in Love with the "Sanbo" Business?
What we want to share most importantly with our valued clients at Shiratoga Research Institute is that Representative Ishikawa is deeply captivated by the business owner community "Sanbo" and the worldview created by its organizer, Kenji Shintani.

What is the most terrifying thing for a company president? It is the risk of "getting stuck by managing solely based on one's own common sense, knowledge, and perceived world," in other words, the biggest management risk of "not knowing." This risk can be mitigated by the study sessions of "Sanbo."

President Shintani does not have an "this is absolutely correct" mindset. Without being bound by his own values, he flatly addresses themes that may present completely opposing arguments, providing business owners with the essential learning they need every week. This flexible approach of "not adhering to a single correct answer" deeply resonates with the stance we at Shiratoga Research Institute cherish.

By immersing themselves in this environment, presidents can realize "what they do not know" and re-examine their company's management from multifaceted perspectives they had not imagined. "I want to deliver this maximally open and stimulating environment to more presidents." This is the biggest reason why Shiratoga Research Institute's Ishikawa fell in love with the "Sanbo" business.

## An Absolute Promise to "Sanbo" Members
With this group integration, there is no need to worry about "the company being acquired, leading to a rigid consulting firm coming in and making things uncomfortable." Please consider this as gaining a strong supporter for President Shintani's business.

We at Shiratoga Research Institute sincerely respect the unique worldview of "Sanbo" that only President Shintani can create. Therefore, we declare, "We will absolutely not do anything that would break the current worldview of 'Sanbo.'" President Shintani will continue to be the top leader in community planning and operation, and the popular study sessions and flat exchange opportunities will continue with the same passion as before.

## "New Synergies" Born from Mutual Understanding, Gently Supporting You
The main focus of the new system is the "Sanbo" community created by President Shintani. Shiratoga Research Institute will not "force implementation" but will act as a behind-the-scenes supporter, "a reliable backup to be called upon when needed."

When business owners gain valuable insights from study sessions and think, "I want to try this for my company," they often end up with half-finished results by trying to do everything themselves. In such cases, instead of pushing consulting services, a new, secure environment is established where "professionals (Shiratoga Research Institute) are readily available for casual sparring sessions."

## Messages from Both Representatives
We share the thoughts of both representatives regarding the "joint operation of businesses" realized through a deep mutual understanding of each other's worldviews.

Tetsuya Ishikawa
President & CEO, Shiratoga Research Institute Inc.
The community business created by Mr. Shintani is truly exceptional. It's the ultimate input space for eliminating the risk of presidents "not knowing," and I myself have experienced its greatness firsthand. We will absolutely protect its wonderful qualities while fully supporting you from behind the scenes when you decide to "put it into practice!"

Kenji Shintani
Representative Director, Keiei Sanbo Co., Ltd.
We have decided to make "Sanbo," a business we have carefully nurtured, a joint venture with Shiratoga Research Institute, who understands and loves it the most. I will continue to be responsible for your learning and community spaces as always, and with Shiratoga Research Institute's participation, the backup system for emergencies will be significantly strengthened. Please look forward to the future of "Sanbo."

## Future Developments and Information
Existing "Sanbo" members, please continue to fully enjoy the flat exchanges and learning opportunities at "Sanbo BAR." When you struggle with implementing new ideas in your own company, you can utilize Shiratoga Research Institute's free sparring consultation as a powerful backup.

Furthermore, for Shiratoga Research Institute's clients and newly interested business owners, we are offering free trial experiences to immerse yourselves in the passionate worldview of "Sanbo." Please come and visit this "best place to be" at least once.

For details and application, please feel free to contact each representative or the contact point below.

## Company Overview
### ■ Shiratoga Research Institute Inc.
Representative: Tetsuya Ishikawa, President & CEO
Location: Sanko Building 7F, 4-11 Nihonbashi-Kodenmacho, Chuo-ku, Tokyo
Established: October 2, 2014
Business Description: Comprehensive management consulting specializing in small and medium-sized venture companies, research and presentation of management concepts and methodologies.
URL: https://www.ssoken.co.jp/
### ■ Keiei Sanbo Co., Ltd.
Representative: Kenji Shintani, Representative Director
Location: Adhoc Shinjuku Building 4F, 3-15-11 Shinjuku, Shinjuku-ku, Tokyo
Established: November 2, 2025
Business Description: Business owner community "Sanbo," business community bar "Sanbo BAR," management consulting.
URL: https://www.ksanbou.co.jp/