Atty. Shintaro Hamasu

Atty. Shintaro Hamasu

Shintaro Hamasu is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law and Corporate and Mergers and Acquisitions Law. Shintaro, who practices law in Tokyo, Japan, has been recognized since 2021.

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Profile Summary

About Shintaro Hamasu at a glance

Shintaro Hamasu is a business and m&a attorney, practicing at Atsumi & Sakai. Admitted to practice in Japan, Tokyo Bar Association. Educated at University of Southern California (LL.M., 2012) and Waseda University (B.A., 2000). Recognitions include Best Lawyers in America — Banking and Finance Law (2027), Best Lawyers in America — Corporate and Mergers and Acquisitions Law (2027), and Best Lawyers in America — Awards: (2027). Serands clients in Tokyo and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Shintaro Hamasu is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law and Corporate and Mergers and Acquisitions Law
  • Shintaro, who practices law in Tokyo, Japan, has been recognized since 2021
  • This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Shintaro is held by other top lawyers in the same geographic and legal practice area

Practice Areas Explained

Shintaro Hamasu's Areas of Practice

Each practice area below reflects the types of cases Shintaro Hamasu handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Shintaro Hamasu is one of 501,317 business attorneys indexed nationally. Browse business attorneys →

Mergers & Acquisitions

Shintaro Hamasu is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys →

Frequently Asked

Common questions about Shintaro Hamasu

Where is Shintaro Hamasu's law office located?
Shintaro Hamasu's law practice is located in Tokyo. The firm is Atsumi & Sakai. You can contact the office directly through this profile page.
What practice areas does Shintaro Hamasu handle?
Shintaro Hamasu focuses on business, m&a. Each practice area listed reflects experience handling cases of that type in their licensed jurisdictions.
Where did Shintaro Hamasu go to law school?
Shintaro Hamasu earned their education at (LL.M., 2012); (B.A., 2000).
How can I contact Shintaro Hamasu for a consultation?
You can contact Shintaro Hamasu directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Shintaro Hamasu received?
Shintaro Hamasu's notable recognition includes: Best Lawyers in America — Banking and Finance Law; Best Lawyers in America — Corporate and Mergers and Acquisitions Law; Best Lawyers in America — Awards:; Best Lawyers in America — The Best Lawyers in Japan 2026; Best Lawyers in America — IFLR1000 2024.

Education

LL.M.
University of Southern California
- 2012
B.A.
Waseda University
- 2000

Awards

Best Lawyers in America — Banking and Finance Law
- 2027
Best Lawyers in America — Corporate and Mergers and Acquisitions Law
- 2027
Best Lawyers in America — Awards:
- 2027
Best Lawyers in America — The Best Lawyers in Japan 2026
- 2027
Best Lawyers in America — IFLR1000 2024
- 2027
Best Lawyers in America — Notable Practitioner
- 2027
Best Lawyers in America — Banking
- 2027
Best Lawyers in America — Project finance
- 2027

Bar Admissions

Japan, Tokyo Bar Association

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