Ken Siegel is consistently ranked as one of Japan's leading international attorneys. Among other things, he is recommended as a leading lawyer by
Chambers Global,
Chambers Asia,
Legal 500 Asia-Pacific,
Practical Law Company (PLC), International Financial Law Review (IFLR) and
Best Lawyers.
- The only attorney rated as a "Star Individual" for M&A in Japan (the level above Band 1) by Chambers Global and Chambers Asia for three years running (2011 - 2013 editions), making him the highest-rated M&A lawyer in Japan. He was previously ranked in Band 1 for M&A in each of the prior 5 years and was the only international attorney to be consistently ranked at this level.
- Ranked as a Leading Lawyer - Corporate and M&A by The Legal 500 Asia Pacific, 2013 Edition.
- Ranked as a leading lawyer, Mergers and Acquisitions - Foreign Law, by IFLR1000, 2014 Edition.
- Listed as a Recommended Lawyer - Corporate/M&A by PLC Which Lawyer?, 2012 Edition.
- Listed in Best Lawyers, Japan, in each year since inception.