[Over 70 Pages] Shifting Japanese M&A from an 'IPO Alternative' to a 'Growth Strategy': Protostar Releases Practical Guidebook for Startup M&A
Protostar has released a practical guidebook compiling insights and expertise on startup M&A.

Protostar Co., Ltd. (Headquarters: Chuo-ku, Tokyo; CEO: Hidemaro Maekawa), with a mission to support challengers, has released a comprehensive "Startup M&A Practical Guidebook (over 70 pages)." This guide systematizes the knowledge gained through its year-and-a-half-long startup M&A support program, "STARTUP M&A Circulation."
■ Background: The Current State of Startup M&A
The Japanese startup environment is at a major turning point. Since 2021, there have been successive large-scale M&A cases worth billions to tens of billions of yen domestically. With the government's "Five-Year Startup Development Plan" also prioritizing the revitalization of M&A, the shift from an "IPO-only" mindset to "M&A as an exit and growth strategy" is accelerating.
However, while market expectations are rising, a deep gap remains in practical operations. The M&A process is extremely complex, and because specific business customs and know-how are often "black-boxed," many executives feel anxious due to a lack of information for decision-making.
We have released this guidebook to remove the barrier of "information asymmetry" and create an environment where challengers can take their next steps with the right knowledge.
■ Contents of the Guidebook (Excerpt)
This guidebook goes beyond theory, focusing on the "first steps" based on real-world practice.
・Overview and latest trends in startup M&A
・Methods to resolve "information asymmetry" faced by both sellers and buyers
・Practical workflows visualizing complex processes
・Checklists to overcome the "lack of visibility" that hinders decision-making
【Author Comment】

Rui Ikeda
Head of Startup M&A Division
Over the past year and a half since October 2024, while promoting the "STARTUP M&A Circulation" program, I have held numerous discussions with many sellers, buyers, and experts.
What I keenly felt was the reality that information asymmetry and process opacity are hindering proactive decisions by executives. Now that the movement to support M&A is strengthening across Japan, a "roadmap" is essential for executives to have the right knowledge and take steps forward with confidence.
As someone who knows the depth of the practice, I have compiled these insights in plain language based on my daily experiences in the field. I hope this book serves as a catalyst to support as many executives as possible.
【Download the Material Here】
Summary Version (For those who want a quick overview)
https://drive.google.com/drive/folders/1RwVJ3dNNXStl0nU7StZ35m0HzLl0xguB?usp=drive_link
Full Version (Over 70 pages; for those seeking practical details)
https://startup-ma.net/download-form
※ A dedicated form must be filled out to download the full version.
Inquiries regarding this release
Protostar Co., Ltd.
Startup M&A Division
ma-consulting@theprotostar.co
Protostar Co., Ltd. is looking for new team members to join us in our mission.
▽ Recruitment Information
https://www.theprotostar.co/recruit
About Protostar Co., Ltd.
Focusing on supporting challengers, we develop diverse services such as "StartupList," one of Japan's largest entrepreneur-investor matching services, and "JP STARTUPS," a media platform that introduces and supports Japanese startups.
In addition to existing businesses such as alliance services that promote co-creation and acceleration between large companies and startups, and the entrepreneur support media "Kigyo LOG," we have recently launched "Startup M&A" to provide M&A support as a growth and exit strategy for startups.
We have established a system to support "challengers" broadly.
Address: 501 Nihonbashi Tomizawa-cho Bldg., 9-4 Nihonbashi Tomizawa-cho, Chuo-ku, Tokyo 103-0006
Capital: 89,098,750 JPY
Established: November 30, 2016
Number of Employees: Approx. 50 (including part-time and contract employees)